Alternatives to qmail

Mailu is a versatile and straightforward mail server offered through a collection of Docker images, designed as free and open-source software that encourages user feedback and contributions. The objective of this project is to deliver an easy-to-install and maintain mail server that is comprehensive and avoids the inclusion of proprietary tools or unrelated features that are frequently part of mainstream groupware solutions. Key functionalities of Mailu encompass: A standard email server setup supporting IMAP and IMAP+, SMTP, and Submission with automated configuration profiles for various email clients. Sophisticated email capabilities, including aliases, domain aliases, and custom routing options. Web-based access featuring multiple webmail interfaces alongside an administrative dashboard. User-centric functionalities such as aliases, auto-reply, auto-forward, and the ability to fetch accounts from other servers. Administrative features that cater to global management, making announcements, domain-specific delegation, and setting quotas. Robust security measures that enforce TLS protocols, integrate DANE and MTA-STS, utilize Let's Encrypt for certificates, provide outgoing DKIM signatures, and incorporate an anti-virus scanner alongside Snuffleupagus for enhanced protection against malware and harmful attachments. Effective anti-spam tools that include auto-learning algorithms, greylisting techniques, DMARC and SPF support, and measures to prevent email spoofing. Overall, Mailu stands out as a comprehensive solution for users seeking a reliable and secure mail server environment.

Aid4Mail is a leading email processing tool from Switzerland. It comes in three editions: 1. Use Converter to collect and convert emails accurately, fast, and reliably. It supports all popular mail services (e.g. Office 365, Gmail, Yahoo! Mail) and mailbox file formats (e.g. PST, OST, OLM, mbox). It’s also a popular solution for preparing mail ingestion into archival, eDiscovery and forensics platforms. 2. Investigator adds powerful search queries based on Gmail and Microsoft 365 syntax, native pre-acquisition filters and Python scripting. Use its forensic features to recover deleted and hidden email, and process corrupt or unknown mail formats. 3. Enterprise adds support for Google Vault, Mimecast, and Proofpoint exports. Use it to migrate your company mail to live accounts (IMAP, Microsoft 365, Gmail). You can integrate its CLI seamlessly with your own tools. Enterprise offers flexible licensing options including installation on a server or on a shareable flash drive. Aid4Mail is used by Fortune 500 companies, government agencies and legal professionals around the world.

MDaemon Email Server supports IMAP and SMTP protocols. It delivers solid performance thanks to its feature-rich, user-friendly design. The email server software is low in total cost of ownership (TCO), and is specifically designed to meet the needs small- to medium-sized businesses. MDaemon supports multiple languages, content filtering, and multiple domains. It also offers flexible administration and an open standard design.

Mail from external sources is collected by Mercury and deposited into the designated mailbox of the recipient, enabling the user to retrieve it whenever they wish. When local users wish to send messages to the outside, these messages are forwarded to Mercury, which manages the delivery process, alleviating the workload on the user's device and permitting them to focus on other tasks. With a dialup connection, only the mail server needs to have access to that link, meaning individual workstations do not require their own modems or Internet connections. This setup allows the mail server to continue managing email even if the client workstations are powered down, thereby supporting functionalities that require constant service availability, such as automatic replies and auto-forwarding. As a result, users enjoy a seamless experience without the need for constant vigilance over their email communications.

MailEnable offers a comprehensive solution for secure email and collaboration services, gaining recognition in a recent independent survey as the leading Windows Mail Server Platform globally. Whether you are a large hosting provider catering to numerous users or a small business managing a single domain, MailEnable delivers a solution that is sure to satisfy your email users. The Windows Mail Server software from MailEnable boasts features that rival those of Microsoft Exchange, including robust messaging protocols like Exchange ActiveSync, IMAP, SMTP, and POP3, along with collaborative tools such as calendaring (CalDAV), contacts (CardDAV), tasks, and notes. This extensive feature set ensures that users have access to everything they need for seamless communication and organization.

Provide your clients with reliable, enterprise-grade email hosting alongside a range of additional services. This outstanding option caters to service providers and is adaptable for a user base ranging from thousands to millions. Attract more clients by presenting a top-tier email server solution renowned for its flexibility, seamlessly integrating with your current systems. You can oversee your email, coordinate and share calendars, and synchronize your mobile devices, all supported by a robust and secure mail server. This solution is ideal for organizations of any scale. Axigen possesses extensive expertise; explore its diverse functionalities and select the ones that align with your needs. Effortlessly manage your emails while enhancing productivity with tools for calendars, tasks, and notes. Experience user-friendly browser functionality with features like keyboard shortcuts, drag-and-drop capabilities, real-time email viewing, frequently accessed folders, customizable email filters, vacation replies, and personal blacklist/whitelist options, ensuring a comprehensive email management experience. With such a versatile system, businesses can streamline their communication effectively.

Dovecot stands out as a remarkable option for installations of any size, whether small or large. Notably, it ranks among the top IMAP servers, offering robust performance while seamlessly supporting both mbox and Maildir formats. Its mailboxes come with transparent indexing that enhances speed and retains full compatibility with traditional mailbox management tools. Adhering to industry standards, Dovecot successfully passes all compliance tests for IMAP servers, unlike many of its competitors that often fall short. One of its impressive features is the self-optimizing indexes, which provide just the necessary information that users typically require without excess. Additionally, Dovecot incorporates self-healing capabilities, autonomously addressing many issues it detects, such as corrupted index files, while ensuring that any problems encountered are logged for further investigation by administrators. Furthermore, Dovecot is designed with user-friendliness in mind, as it aims to present common error messages in a straightforward and comprehensible manner, making it easier for administrators to resolve issues. Overall, Dovecot's combination of performance, compliance, and user-centric features makes it a top-tier choice for email server solutions.

Easily connect Windows® clients to your domain with Zentyal, ensuring a seamless user experience without the need for user or device CALs. This solution incorporates reliable SMTP and POP3/IMAP mail servers, utilizing well-established technologies and protocols for optimal performance. It guarantees secure Internet access while effectively managing essential network infrastructure services. Users can benefit from software updates until the end-of-life date for each version, and support is readily available when needed. Zentyal serves as an intuitive alternative to Windows Server®, featuring native compatibility with Microsoft Active Directory® for straightforward management of Windows® clients. Furthermore, it allows for flexible deployment options, enabling Zentyal to function as a mail server, domain and directory server, or a comprehensive all-in-one server solution for your organization. This adaptability makes it an excellent choice for businesses looking to enhance their network management capabilities.

WinGate Proxy Server serves as an efficient and versatile HTTP Proxy server, SOCKS server, and integrated Internet gateway, tailored to address the access control, security, and communication requirements of modern enterprises. With a diverse array of features, it offers flexible licensing options that can adapt to the budgets of different users, whether for a large corporation, a small business, or a residential network. This server enables the sharing of various types of Internet connections, permitting numerous users to browse the web, access email, and utilize other online applications as if they were directly online. Regardless of whether the connection is through a standard dial-up modem or a high-speed fiber line, WinGate Proxy Server enhances the overall usage of that connection. Furthermore, it is compatible with multiple Internet protocols, facilitating the functionality of applications including web browsers, messaging tools, FTP, and SSL. Overall, WinGate Proxy Server is an invaluable tool for any organization looking to streamline its internet access and improve security measures.

Halon MTA makes your company more competitive by delivering important emails promptly and implementing features quickly. You will also reduce your development and maintenance costs by up to half. The Halon MTA allows for flexible email operations and security. It allows large-scale organizations to offer competitive features through rapid implementation. Halon MTA consolidates email infrastructure, reducing complexity and risk. It makes email infrastructure easy to manage, scalable, and rich in functionality. Poor customer experience due to slow and expensive implementation of new standards and email features. Halon improves email service competitiveness through rapid implementation and reliable deployment. Halon's holistic approach reduces system complexity, in contrast to traditional layers of email infrastructure.

The optimal approach to constructing your mail server using open source software is to utilize platforms such as CentOS Stream, Rocky, Alma, Debian, Ubuntu, FreeBSD, and OpenBSD. By employing iRedMail, you can set up a FREE, OPEN SOURCE, and COMPLETELY FUNCTIONAL mail server in just a few minutes. We have taken care of the complexities by assembling all necessary open source components and implementing best practices, allowing our product to handle all essential tasks on your behalf. In addition, we provide professional support to assist you should you encounter any issues. You maintain complete ownership of your personal data stored on your hard drive, giving you the ability to control email security and review transaction logs. No external organization has access to the content of your communications. All components integrated into iRedMail are based on open source software, ensuring you receive bug fixes and updates from reputable Linux/BSD vendors. With iRedMail, you are not only building a mail server but also gaining peace of mind knowing that your email system is secure and private. In this way, iRedMail stands out as the definitive solution for those looking to establish a mail server using open source software.

Haraka is capable of managing thousands of simultaneous connections and can process an impressive volume of messages each second. Both Haraka and its plugins are developed using asynchronous JavaScript, resulting in exceptional speed and performance. With robust spam protection mechanisms available through its plugins, Haraka serves effectively as a filtering MTA. Additionally, it functions well as a Mail Submission Agent (MSA) on port 587 when utilizing authentication and DKIM signing plugins. Unlike traditional mail servers such as Exchange or Postfix, Haraka is not designed to act as a mail storage solution, Local Delivery Agent (LDA), or an IMAP server like Dovecot or Courier. Instead, it is typically combined with these systems for enhanced functionality. The built-in outbound mail delivery engine of Haraka is scalable, ensuring efficient processing of messages marked for relaying through authentication plugins, which are automatically queued for delivery. Furthermore, Haraka's plugin framework allows for easy extensions, making it a complementary option for traditional MTAs that may lack adequate filtering capabilities, thus enhancing the overall email handling process. This modular approach provides flexibility, enabling users to tailor their email solutions according to specific needs.

Take back your autonomy and safeguard your personal information by setting up your own email server, a process that can be completed in under 10 minutes! With Modoboa, you can establish your email server at no cost in less than 10 minutes. When it comes to establishing a mailbox, you typically have a few choices: - Rely on services provided by internet and infrastructure companies (like Orange, Vodafone, OVH, or Gandi), which often require a monthly or annual fee, but they come with limitations on customization, configuration options, and the number of domains and mailboxes you can use. - Opt for free email services (such as Gmail, Live, or Yahoo), which come with restrictions and often exploit your data for commercial gain. - Set up your own email server, although this usually demands a significant level of technical expertise for proper installation and configuration. Modoboa presents a viable alternative to these three options. It liberates you from the constraints of traditional email providers, allowing anyone to create a secure email server independently. Best of all, this entire process takes less than 10 minutes and is completely free of charge. Embrace the freedom of managing your own email with ease!

Dovecot Pro stands out as a comprehensive email solution that offers exceptional scalability, impressive performance, optimal hardware usage, and superior support for major telecommunications companies, internet service providers, and hosting services globally. Holding a dominant 76% share of the email backend market, Dovecot Pro is trusted by its customers for reliable performance and minimal downtime. Its efficient management of hardware resources, alongside innovative monitoring tools for statistics and administration, effectively lowers ownership costs while saving both time and maintenance expenses. Additionally, Dovecot Pro has the capacity to expand both vertically and horizontally, accommodating hundreds of servers, millions of users, and multiple physical locations. The architecture is stateless and native, allowing for maximum adaptability, as every significant component can be independently deployed on dedicated nodes. Moreover, Dovecot Pro excels in providing top-notch support for all essential email standards, ensuring seamless Mail Delivery Agent capability through LMTP and Sieve, while also facilitating mail retrieval for various clients via IMAP and POP3 protocols. This robust infrastructure underlines its commitment to meeting the diverse needs of its client base.

Our comprehensive Unified Communications technology is anchored by the CommuniGate Pro platform. This system facilitates extensive Unified Communications through open APIs that allow seamless integration with various business applications. With the ability to scale to hundreds of millions of accounts, CommuniGate Pro is perfectly suited for large-scale alert systems, multimodal communications in web applications, or highly secure network architectures. Importantly, achieving such scale does not compromise efficiency or reliability; the platform is exceptionally agile and capable of supporting resilient applications in military and embedded environments. Furthermore, CommuniGate Pro has received approval for use by governmental agencies in both Europe and the USA. Its reputation for outstanding stability—boasting impressive uptimes akin to VMS—has made it a trusted choice among military, transportation, and research institutions. Additionally, the platform enables banks to efficiently manage email services for millions of clients while ensuring compliance with regulatory standards. The server's signaling capabilities can also be effectively implemented within a hybrid system, enhancing its versatility even further. This makes CommuniGate Pro a top-tier solution for organizations looking to optimize their communications infrastructure.

Exim serves as a mail transfer agent (MTA) for Unix-like operating systems. Initially developed by Philip Hazel in 1995 for the University of Cambridge Computing Service's email systems, Exim is released under the GPL, allowing users to freely download, utilize, and modify it. While it shares some similarities with Smail 3, Exim has evolved to offer greater user-friendliness and flexibility. Both Exim and Smail 3 operate on the Sendmail design model, where a single main binary manages all MTA functionalities. Although this monolithic architecture is sometimes viewed as less secure and slower, Exim boasts a superior security record compared to Sendmail and matches the performance of Qmail and Postfix, particularly in advanced functions like queue management, address routing, and testing. Notably, Exim lacks a built-in Graphical User Interface (GUI) for configuration, although some Linux distributions may provide one, enhancing its accessibility for users who prefer a visual approach. As a result, Exim remains a versatile choice for those looking to manage email systems effectively.

Mailtraq Professional mail server software serves as a comprehensive solution for businesses seeking efficient email management. It delivers all necessary functionalities at an affordable cost, eliminating common complications associated with email servers. As a perfect alternative to Microsoft Exchange, Mailtraq is user-friendly to deploy and straightforward to oversee. With attractive licensing fees, no server client access licenses (CALs), and reliable performance, Mailtraq is the go-to choice for small to medium-sized businesses and home offices. Email plays a crucial role in the operations of any organization, and the security of stored messages is essential for the sustained success of your company. Although managing your own email server can involve some level of complexity and costs, it provides you with total physical control over who accesses your email communications. In contrast, utilizing your internet service provider's email service raises privacy concerns, as their administrators can access and read your messages. Likewise, relying on a software-as-a-service (SaaS) provider for hosted email solutions means you may not only be unaware of who is accessing your emails but also lack information about the physical location of your data storage. Therefore, opting for Mailtraq ensures both control and peace of mind regarding your email integrity and confidentiality.

Setting up a fully operational mail server can be achieved in just a few minutes, primarily spent waiting for the necessary scripts to execute. The entire system is engineered with sensible defaults, allowing you to get started swiftly without needing in-depth knowledge of the internal workings or risking system integrity with potentially harmful choices. User information and configurations are meticulously separated from the executable files, with the user database maintained in an SQLite format, which is file-based. This structure ensures that Poste.io seamlessly integrates with external storage options, making tasks like migration, backups, and updates straightforward and predominantly involving file handling. Designed with a focus on security from its inception, Poste.io addresses the serious security challenges that have historically plagued the internet. Rather than compromising on compatibility with outdated email clients and vulnerable authentication processes, it prioritizes features that align with contemporary security standards, ensuring users can trust their communications. Additionally, this commitment to security reflects an awareness of the evolving landscape of cyber threats, making Poste.io a robust choice for reliable email management.

Experience secure and private email, calendars, and additional features, all at no cost and utilizing Free & Open Source Software (FOSS). We prioritize open standards and formats for every aspect of storage and communication, ensuring no vendor lock-in occurs. Your data is kept secure under Swiss jurisdiction, and will never be shared with third parties without your explicit permission. Our services comply with GDPR, HIPAA, and PCI regulations, and are built with security as a top priority from the very beginning. We offer perfect forward secrecy (PFS) and provide end-to-end encryption options, with no back doors present. Our comprehensive documentation addresses many commonly asked questions and more. If you're in search of an immediate answer or a swift solution, our Knowledgebase is an excellent resource. For any inquiries or issues that remain unresolved in the documentation, you can always reach out to our support team for assistance. We are committed to ensuring your experience is both safe and satisfactory.

Enhance your Outlook experience through features like push email, personal information management, group scheduling, availability services, public folders, delegation, and additional functionalities. By utilizing fewer servers and attractive subscription models, you can boost your profit margins effectively. Furthermore, cut down on licensing expenses while capitalizing on your team's current expertise by adopting a Linux-based system. Scalix offers starter packs that serve as comprehensive, single-server messaging solutions tailored for smaller enterprises and organizations, delivering a complete suite of email and collaboration tools. The Scalix small business edition is specifically crafted for small enterprises, providing a rich array of business capabilities, including the ability to quickly recover deleted user-specific items, support for mobile devices, and various other essential features. This solution not only facilitates efficient communication but also empowers businesses to operate seamlessly in a competitive landscape.

Your computer, tablet, and smartphone come equipped with applications and operating systems, so why should your server be any different? HPE is revolutionizing the small business server market by providing ClearOS in conjunction with their ProLiant servers. ClearOS is an accessible, open-source operating system featuring a user-friendly graphical web interface and an application marketplace that boasts over 100 applications, with new ones continuously being added. By utilizing open-source technology, you have the autonomy to select only the applications you need while paying solely for the desired apps and their support. HPE and ClearCenter are simplifying the process for small businesses, home offices, remote workers, and branch locations to have a fully operational server right out of the box, without incurring extra costs. The combination of HPE ProLiant servers and ClearOS ensures users enjoy a straightforward, cost-effective, and secure solution. Crafting the perfect IT setup tailored to your needs has never been more straightforward or accessible. With this innovative approach, small businesses can now focus on growth rather than infrastructure.

Experience secure, enterprise-level email, calendar, and collaboration tools without breaking the bank. Kerio Connect offers a comprehensive suite of features and capabilities for messaging and collaboration without the intricacies and hefty costs associated with other platforms. It seamlessly integrates email with shared calendars, scheduling, contact management, tasks, notes, shared and public folders, and instant messaging. You can synchronize your messages directly to your preferred mobile devices using Microsoft ActiveSync. The Instant Messaging feature is compatible with XMPP, allowing use with various third-party chat and IM applications on both desktop and mobile devices. Installation of Kerio Connect takes just 10 minutes, with users able to start working within an additional 10 minutes. This solution can be deployed either on-premises or through partner-hosted cloud environments, accommodating users on Mac, Windows, or Linux systems. Furthermore, it provides comprehensive support for Outlook on both Windows and Mac, as well as numerous other IMAP or POP-compliant email clients, ensuring versatility and ease of integration for all users.

Mail-in-a-Box allows you to establish your very own mail service provider with just a few straightforward steps, similar to creating a personalized version of Gmail that you have complete control over. Essentially, it transforms a new cloud computer into a fully functional mail server, and you don’t need to possess advanced technical skills to get it up and running. Each Mail-in-a-Box setup comes equipped with webmail access and an IMAP/SMTP server, making it compatible with both mobile devices and desktop email applications. Additionally, it offers synchronization for contacts and calendars, ensuring that all your information stays up to date across devices. Moreover, the system includes essential mail features such as spam protection through filtering and greylisting, customizable mail filter rules, automatic configuration for email clients, and scheduled backups to services like Amazon S3. Another advantage is its automatic DNS configuration, which simplifies the process when you allow it to function as your nameserver, enabling it to establish crucial DNS records that enhance mail deliverability and security, including SPF, DKIM, DMARC, and MTA-STS. Furthermore, when DNSSEC is activated along with DANE TLSA, it significantly elevates the level of security for your email communications.

The Courier mail transfer agent (MTA) serves as a comprehensive mail and groupware server that utilizes widely recognized protocols, including ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Within a unified framework, Courier delivers a range of services, such as ESMTP, IMAP, POP3, webmail, and mailing list functionalities, allowing users to easily enable or disable specific components as needed. Recently, the Courier mail server has introduced fundamental web-based calendaring and scheduling features within its webmail module, with plans for more sophisticated groupware calendaring capabilities to come shortly. Notably, the source code for the Courier mail server is designed to compile on most POSIX-compliant operating systems that utilize Linux or BSD-derived kernels, and it can also be successfully compiled on Solaris and AIX systems, provided users utilize the appropriate freeware add-on tools from Sun or IBM. The development of the Courier mail server is rooted in a combination of several interrelated projects that converged into its current form, and it also incorporates SMTP extensions specifically aimed at enhancing mailing list management functionality. In this way, Courier not only serves as a versatile mail server but also as a collaborative tool for users seeking effective communication solutions.

James represents the Java Apache Mail Enterprise Server, featuring a modular structure that utilizes a comprehensive collection of contemporary and effective components. This architecture ultimately delivers fully-functional, stable, secure, and extendable mail servers that operate on the Java Virtual Machine (JVM). You can craft a tailored email management solution by selecting the necessary components, thanks to the Inversion of Control mail platform it offers. Additionally, you can enhance your email processing capabilities by customizing filtering and routing rules through the James Mailet Container. The Apache James project integrates various libraries that constitute James, ensuring that the services are readily available for download from Apache mirrors, making it easier for users to implement their email solutions. As a result, this flexibility allows for significant customization to meet diverse communication needs.

We offer a digitally sovereign solution that enables you to manage your emails and calendars effectively, organize tasks, and maintain communication with team members through video conferences. Kopano Groupware serves as a robust email and calendaring platform, functioning similarly to Microsoft Outlook and Exchange. It supports installations for over 100,000 users, making it scalable for various organizational needs. This email and calendar server delivers essential communication and organizational information to users across all their devices while fostering collaboration among teams. Additionally, users can collaboratively edit documents within shared public folders or share content directly from their personal inboxes, enhancing teamwork and productivity.

Founded in 2000 by Philippe Gilbert, Alinto emerged from his bold vision and has since made significant strides in the digital communication landscape. By assembling a dedicated group of developers and specialists in cloud messaging, the company pioneered the first messaging platform in Europe that featured a cloud-based email solution, as well as the first web-based email accessible via mobile devices. This innovation allowed us to establish ourselves as a key player in the European digital sector. As a provider of software mail servers, our teams in R&D, Marketing, and Support prioritize a customer-centric approach that emphasizes availability and accessibility. More than just an electronic communication service, we offer tailored care and solutions that cater to your specific needs and requirements. Additionally, our team of experts is always on hand to provide support, ensuring that whether you are a telecom operator, an internet service provider, or an IT professional, you can count on us for assistance and guidance. We take pride in building lasting relationships with our clients to foster mutual growth and success.

MailSite Fusion serves as a comprehensive email, calendar, and contact server for Windows, offering seamless over-the-air synchronization with various smartphones, full native Outlook integration, an advanced AJAX web client, and a server for sharing calendars and contacts, which can also sync and publish to multiple other clients. For three consecutive years, it has consistently ranked among the top three mail server products according to the readers of Windows IT Pro Magazine. Given the essential nature of email services to your organization, it is crucial to choose a reliable product from a company that has demonstrated expertise in communication software. So, what makes this mail server stand out? Rockliffe has dedicated itself to the development and enhancement of email server and security solutions for businesses and service providers since 1995, addressing your concerns with a sense of urgency. Engineered from the ground up to prioritize speed, stability, and security, MailSite Fusion is equipped to fulfill your most pressing needs and expectations effectively. Moreover, its robust features ensure that you can manage your communications seamlessly while maintaining a high level of security.

Oracle Communications Messaging Server is an Internet messaging solution built on standards, aimed at providing robust and high-capacity message handling for both service providers and their end-users. This versatile Messaging Server accommodates various email protocols and is capable of managing a wide array of content types, including embedded text, audio, graphics, video files, and other formats. Its design ensures reliability and efficiency in message delivery, making it a preferred choice for organizations seeking effective communication tools.

Horde stands out as the most adaptable groupware solution available, making it an ideal foundation for developing your business productivity applications. It boasts compatibility with a wider array of backends—including all major SQL, LDAP, IMAP, Sieve, SMTP, and caching platforms—than any other open-source groupware option currently on the market. As a result, you can seamlessly integrate your existing user base without requiring them to remember additional passwords. The extensive feature set of Horde is on par with the most prominent enterprise email systems, offering remarkable capabilities that hold up against competitors in our core applications, such as mail, calendar, and address book, as well as excelling in secondary applications like time tracking, wikis, and ticketing systems. Furthermore, this versatility ensures that users can tailor their experience to meet their unique needs, enhancing overall productivity and satisfaction.

Cyrus IMAP serves as a server for emails, contacts, and calendars, and is available as free and open-source software. Among its many features are high-speed performance, strong security measures, and efficient resource management. Additionally, it includes powerful search capabilities and supports both CardDAV and CalDAV protocols. The platform ensures robust data storage and offers replication features, making it suitable for large-scale installations. Flexible filtering through Sieve allows for customizable email handling, while integration with antivirus and antispam toolkits enhances its security. Moreover, Cyrus IMAP effectively manages deliverability standards such as SPF, DKIM, and DMARC. It provides extensive authentication possibilities through Cyrus SASL and includes support for JMAP, alongside a comprehensive array of supported standards that enhance its versatility. Overall, Cyrus IMAP is an ideal solution for organizations seeking a reliable and feature-rich email server.

KumoMTA, a high-performance and highly flexible sending platform, is available under an Open Source license for high-volume email users looking to replace PowerMTA, Momentum, or traditional Open Source MTAs.

The system analyzes all web traffic and can block specific websites through both HTTP and HTTPS using the Squid proxy. It is integrated with ClamAV antivirus and employs site blacklists for enhanced security. The setup features a multi-domain web server powered by a ready LAMP stack, allowing for the hosting of multiple domain names on a single server. Built on NextCloud, it offers universal access to your files via the web, personal computers, or mobile devices, ensuring you can access your information from anywhere. Additionally, it provides a private alternative to Slack through the Mattermost platform, which facilitates secure collaboration among teams. The modern web interface, built on Cockpit, streamlines common administrative tasks and boasts a quick and straightforward installation process. This infrastructure is based on CentOS/RHEL, a widely used server distribution known for its routine security updates and exceptional stability, making it a reliable choice for various applications. With this setup, users can benefit from both functional versatility and robust security measures.

There is no office. That is the only rule. TeamChat for project teamwork, business email, TeamChat to collaborate on office documents, and online meetings. All this and more in our secure cloud at half the cost. Chat in groups organized around projects, upload files and mention coworkers. Comment on emails posted by others. Pin important posts. Integration with email allows you to share received messages directly into TeamChat room to catch the attention of colleagues. Desktop Client and Desktop Office documents for Windows and Linux will help you increase your office productivity. You can choose to purchase the entire Suite or just the apps you need.

The COVID-19 pandemic has significantly transformed our daily lives and work environments. With the increase in remote work, there has emerged a pressing demand for enhanced communication, collaboration, and adaptability. OpenText™ FirstClass® serves as a robust collaboration platform that facilitates teamwork, boosts communication, and allows easy access to people and information from any mobile device, ensuring that team members stay connected across the organization. As a comprehensive solution, FirstClass is not only cost-effective but also flexible and user-friendly. It empowers both individuals and teams to collaborate effectively toward shared objectives, fostering a collective sense of purpose and introducing innovative methods of engagement. Specifically designed for collaboration, FirstClass provides secure communication, mobile accessibility, customization options, seamless integration with other applications, and dependable archiving, making it an essential tool for any organization navigating the complexities of modern work. Additionally, its user-friendly interface and comprehensive features contribute to a more streamlined workflow, enhancing overall productivity and team cohesion.

As a business on the rise, maintaining strong connections is essential, and that means you definitely need email services. However, managing daily operational hurdles can be overwhelming, and that's where we come in. You're in the perfect place for assistance. GMS has been a trusted name since the dawn of email, bringing a wealth of experience in catering to customer needs. We understand your challenges because we share your commitment to your business. Our approach is straightforward: we avoid complex jargon and strive for clarity. With GMS, you receive the perfect email solution tailored for small enterprises, along with comprehensive support. Transitioning to the Cloud means businesses and individuals can eliminate concerns about power needs, physical space, or software upgrades. With cloud computing, the burden of physical storage and ongoing maintenance is lifted, resulting in a markedly lower total cost of ownership. Ultimately, this shift empowers you to focus more on your business and less on IT concerns.

The relay restrictions have been entirely reimagined to feature a more user-friendly interface that allows for enhanced control over relay security measures. Additionally, EIMS introduces its own Domain Name Resolver (DNR), designed to address issues present in the Open Transport DNR and to improve performance compared to the OS X DNR, although it currently lacks support for non-recursive DNS configurations. Furthermore, a new SMTP Submit port has been added, operating on TCP port 587 by default, mirroring the functionality of the standard SMTP port; this is particularly beneficial for clients whose ISPs restrict access to port 25. An option to set a maximum number of recipients per message has been incorporated, and the previously mandatory Expand SMTP Addresses feature can now be disabled, a change from EIMS versions 3.1 and earlier where it was always enabled. In addition, the SMTP server on both ports 25 and 587 is now equipped to log Telnet connections and recognize activities resembling port scans, enhancing security monitoring capabilities. Overall, these updates aim to provide users with greater flexibility and security when managing their email services.

XgenPlus is the most advanced enterprise email solution. Communicate and collaborate with it. It is the first IDN Email Server to provide EAI (Email Address Interization), i.e Linguistic Email Address, like (Email address written in Hindi). It is an email management software that can be used by any enterprise, SME, PSU, or government. department. It supports all the basic features like POP, IMAP and webmail, calendars, contacts, SMS, scheduling and security. Key Features IDN Email - The only internationalized domain name email hosting server Policy for auto archival and mail retention Merge / de-merge email account Group Mail with a Tracking Report Broadcast email Schedule Email / SMS & Other... Benefits: Reliable - 99.99% uptime Scalable: Flexible to meet the needs of your organization Robust Security: Inbuilt Antispam software Live Chat, On-Call, and Offline Support Available 24x7 Easy Data & Administrative Control Better Storage

SmarterMail is the ideal Microsoft Exchange alternative. First, it's the only business email server on the market that offers native support for the protocols that power Exchange: MAPI, EWS, and EAS. It does this without the need for any additional software or plug-ins for Microsoft Outlook or other clients -- desktop and mobile! Best of all, it offers all of the features of Exchange, but at a FRACTION of the cost. In addition, features like audio and video group chat, and Online Meetings for team meetings and group collaboration are included at no extra charge. It's designed to provide the functionality businesses need, without sacrificing secure, reliable access to business, and personal, communication.

hMailServer is a complimentary and open-source email server designed for the Microsoft Windows platform. It is utilized globally by various entities, including internet service providers, businesses, governmental organizations, educational institutions, and individual users with a passion for technology. The server accommodates standard email protocols such as IMAP, SMTP, and POP3, making it compatible with numerous existing webmail systems. Additionally, it features a customizable score-based spam protection system and can be integrated with virus scanners to ensure that all incoming and outgoing emails are thoroughly checked for threats. This versatility makes hMailServer a popular choice for those seeking a reliable email solution.

Enhance your productivity with a business-class email and calendaring solution. With Exchange, you can effectively collaborate on essential documents while enjoying a streamlined inbox that highlights significant messages and adjusts to your individual work habits, allowing you to accomplish tasks more efficiently. Benefit from a customized inbox filled with useful features, along with a more structured method for managing and engaging with your emails. Enhanced search functions deliver quicker and more comprehensive results, and the inclusion of Add-ins provides powerful customization options that link you to contemporary services and internal business applications. Additionally, optimize your schedule with a sophisticated calendaring system that surpasses mere appointment setting, automatically capturing details from emails like flight confirmations and hotel bookings, and offering venue suggestions based on your current location. Microsoft Exchange Online serves as a robust hosted email platform designed for businesses, ensuring the protection of your data through advanced security measures. With these tools combined, you can streamline your workflow and empower your team to work more innovatively.

KingSMTP (formerly known as Kingmailer, founded in 2017) is a simple and fully featured mail server / SMTP service for use by anyone, not just developers. Start sending, receiving or routing your emails with a few clicks.

Atomic Mail is a privacy-focused email hosting service that prioritizes user security while delivering a seamless email experience. It offers a range of features including the ability to create multiple email aliases for enhanced privacy, ensuring a spam-free environment with no advertisements, and providing email password protection. Additionally, Atomic Mail incorporates end-to-end encryption, allowing only you and your designated recipient to access the contents of your messages. The service guarantees zero access encryption, meaning Atomic Mail itself cannot view your emails, thus upholding your privacy. Furthermore, account recovery is simplified through the use of a unique seed phrase, enabling you to regain access to your account without sacrificing security. This combination of features makes Atomic Mail a reliable choice for individuals who value both privacy and ease of use in their email communications.

SOGo is a reliable and well-supported groupware server designed with an emphasis on scalability and adherence to open standards. Released under the GNU GPL/LGPL v2 and later, SOGo features an advanced AJAX-based web interface while accommodating various native clients by utilizing standard protocols like CalDAV, CardDAV, and GroupDAV, in addition to Microsoft ActiveSync. Acting as the crucial link within your infrastructure, SOGo provides users with a cohesive and comprehensive interface for accessing their data. Its effectiveness has been demonstrated in production settings that cater to thousands of users, ensuring robust performance and efficiency. Overall, SOGo enhances collaboration and information retrieval within organizations of any size.

Citadel offers email, collaboration, groupware, and content management solutions that can be quickly deployed on your own servers or in the cloud. With its unique room-based architecture, Citadel is not only user-friendly but also highly adaptable and robust. Unlike any other platform, it successfully integrates a wide range of features while maintaining a familiar and cohesive interface. This software is entirely open source, distributed under the GNU General Public License, ensuring users access the full version without limitations or cost. You can download the most advanced version available here, and the best part is that it’s all provided at no charge. This makes Citadel an exceptional choice for those seeking powerful and comprehensive software solutions without the financial burden often associated with enterprise editions.

The best and most popular solution for converting MBOX to PST. This software allows anyone to export their MBOX email into Outlook PST format. The software features a smart GUI interface that makes it easy to use the software for MBOX to Outlook PST conversion. These features make it easy and safe to use with 100% accuracy. Outlook is not required to install the software to convert MBOX files to PST format. Outlook can import multiple MBOX files at once, with multiple file saving options. Below are the features of the software. All MBOX data can be exported to Outlook PST with a single click To create a single PST option for all mailboxes, create a single PST. Create a separate PST to create different PSTs per mailbox. The Add file option allows users to access their local storage to retrieve the MBOX file. Compatible with Windows 10, 8, 7, and older versions

Mailcow: Dockerized is a self-hosted email and groupware solution built on Docker technology. It incorporates a variety of established and reliable components that work together to create a hassle-free email server experience. Each application is encapsulated within its own container, all linked through a bridged network for seamless interaction and functionality. This modular approach enhances the scalability and maintainability of the server setup.

OpenSMTPD serves as a free implementation of the SMTP protocol for server-side email communication, as laid out in RFC 5321, and incorporates several additional standard extensions. This software enables standard machines to facilitate email exchanges with other systems that also utilize the SMTP protocol. Born from a desire for a more satisfactory alternative to existing solutions, OpenSMTPD offers a comprehensive SMTP implementation. The project is mainly driven by developers Gilles Chehade and Eric Faurot, alongside contributions from numerous OpenBSD developers and collaborators from various other communities. Its development reflects a commitment to improving email server functionality and reliability across different platforms.

MailsDaddy's MBOX to Office 365 solution provides a streamlined process for transferring multiple MBOX files into various Office 365 mailboxes, including Primary, Shared, In-Place Archive, and Group mailboxes. Users can easily upload emails and their attachments from .mbox files into Office 365 or Live Exchange Server with minimal hassle. The tool offers flexibility by allowing users to manually add MBOX files, browse folders containing the files, or search for MBOX files in a designated location. Designed with a sophisticated algorithm, the MBOX to Office 365 Migration Tool simplifies the migration process significantly. It ensures that the original folder names and structures are maintained throughout the migration to the Office 365 mailbox. For those who wish to migrate only specific emails rather than the entire contents of the MBOX files, the software provides the option to select individual messages and then click the Export button to complete the migration. This feature enhances user control over the migration process and allows for a more tailored approach to email transfer.

MigrateEmails MBOX Migrator offers a swift and dependable method for transforming MBOX files into various formats or email clients. This versatile tool can convert MBOX files into formats such as PST, PDF, MSG, EML, CSV, and more, while also enabling users to migrate their MBOX files directly to platforms like Gmail, Office 365, G Suite, Yahoo, and Zoho Mail. With its advanced features, the MBOX File Migrator ensures a secure and efficient conversion process, maintaining the original folder hierarchy throughout. Users can test its capabilities with a demo version that allows the migration of 50 emails per folder. Additionally, it is compatible with all versions of Windows OS, making it accessible for a wide range of users. Overall, this tool stands out for its user-friendly interface and robust functionality.