Alternatives to Horde

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.

Horde Groupware is a free, browser-based collaboration suite designed for enterprises, enabling users to handle and exchange calendars, contacts, tasks, notes, files, and bookmarks through components that adhere to industry standards from the Horde Project. This suite encompasses various applications such as Kronolith, Turba, Nag Mnemo, Gollem, and Trean, which can be utilized separately or together. Moreover, it offers extensibility through additional released Horde applications, as well as modules currently under development, like a bookmark manager and a file manager. The platform supports dynamic, basic, and mobile interfaces, allowing for public and shared resources like calendars, address books, task lists, and notepads. It is available in 41 languages, including those that read right-to-left, and provides comprehensive Unicode support. Users can also customize their portal screens with applets for features like weather updates and motivational quotes. Additionally, the import and export capabilities for groupware data from other applications enhance its versatility, while user preferences can be set with global default values for a tailored experience. Overall, Horde Groupware stands out as a comprehensive solution for collaborative needs in various organizational settings.

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.

Horde3D is a compact open-source 3D rendering engine designed to deliver impressive visual effects characteristic of next-generation gaming while maintaining a lightweight and clean conceptual framework. Its user-friendly interface can be utilized through nearly any programming language, making it especially adept at rendering extensive crowds of animated figures with high-quality graphics. The engine's complete scene graph and animation systems are tailored specifically for this purpose, ensuring efficiency in performance. To minimize call overhead, Horde3D focuses on maintaining smaller node hierarchies and leverages cached data to enhance the speed of animations. Additionally, the geometry is fine-tuned for optimal cache effectiveness, allowing for multiple levels of detail in models. It also supports vertex skinning and implements deferred shading techniques, which help decrease the number of draw calls in scenes that feature numerous light sources. Overall, Horde3D stands out as a versatile tool for developers seeking to push the boundaries of visual fidelity in their projects.

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.

A comprehensive groupware solution tailored for businesses and service providers, complemented by mobile applications. This private cloud platform seamlessly integrates groupware, file storage, and email into one cohesive environment. Featuring a sleek and contemporary interface, it can operate with your current mail server or provide a full-service option. Users on iOS and Android can effortlessly access their emails and files by simply entering their email credentials, eliminating the need for complex mail server configurations or issues with blocked IMAP/SMTP ports. Additionally, the system supports integration with LDAP for authentication and address book functionalities, as well as OAuth 2.0 for accessing resources such as Google Drive or Dropbox, ensuring a versatile and user-friendly experience for all. This makes it an ideal choice for organizations seeking efficiency and ease of use in their communication and collaboration tools.

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.

Free your device from the clutter of unnecessary junk files by swiftly clearing out cache and leftover data, which not only liberates precious storage but also helps avoid sluggish performance. Terminate unwanted background processes to free up RAM, thereby enhancing the speed of your Android device and prolonging its battery longevity. Additionally, remove sensitive information such as SMS/MMS, browsing history, call logs, app logs, and app packages from your Android phone to safeguard your privacy and online security. Taking these proactive measures can significantly improve your device's overall performance and ensure a safer user experience.

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.

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.

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.

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.

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.

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.

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.

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.

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.

You can build, secure, and run the complete set of features. All you need to build and secure your projects, automate your day-today tasks, and protect yourself against vulnerabilities - all from one dashboard. Add domains and subdomains, and move them between subscriptions. Configure DNSSEC and DNSSEC. All domains can be secured with the SSL It! extension. Horde & RoundCube webmail for Plesk Linux / Windows Automatically set up Thunderbird and Outlook clients with mail autodiscovery plus SNI support. You can move databases between subscriptions, and see which database is linked with which website. MariaDB is now the database server for customer websites. The all-new File Manager is available to make your life easier. It now includes mass uploading and file searching capabilities.

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.

ToolsGround Email Backup Software serves as a comprehensive backup solution, enabling users to securely save backups from a variety of cloud-based platforms, including AOL, AT&T, G Suite, Gmail, Horde, Hotmail, iCloud, Office 365, Outlook.com, Rediff, Roundcube, Yahoo, Zoho, and more, into formats such as PST, EML, EMLX, MSG, MBOX, HTML, and MHTML. It features a swift backup option that allows users to implement filters for selected backups. Recognized for its safety and precision, ToolsGround Email Backup Software has undergone thorough evaluation by experts and is crafted with user-friendliness in mind by its developers. The intuitive interface allows users to easily understand the process of backing up their cloud emails to various storage devices like hard drives, pen drives, and computers. With just a few clicks, users can complete their backup tasks without any hassle or complicated steps. The application ensures that there is no loss of data or changes during the backup process. Additionally, having a backup readily available allows users to access their email databases without the need to log in to their email clients repeatedly, thereby enhancing convenience and efficiency. Overall, the software effectively streamlines the email management process for users.

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.

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.

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.

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.

FTGate stands out as an award-winning server for Email, Groupware, and Productivity, recognized for its affordability in installation and operation, along with secure communication features and straightforward administration. This platform provides a robust and budget-friendly alternative to Microsoft Exchange, ensuring users enjoy extensive compatibility with various mail clients across numerous platforms. Additionally, the impressive FTGate Web Mail client offers a wide array of email, groupware, and productivity tools, all presented within an easy-to-navigate browser interface. With minimal hardware requirements and efficient administration processes, FTGate emerges as an optimal choice for fulfilling your email, groupware, and productivity needs. As workplaces evolve to accommodate a variety of devices, FTGate empowers users to select their preferred mobile and desktop options, allowing for a more personalized and flexible working experience. This adaptability helps organizations enhance productivity while catering to the diverse preferences of their employees.

RainLoop Webmail stands out as an excellent email solution due to its modest system requirements, solid performance, and straightforward installation and upgrade process, all while eliminating the need for a database. It features a modern user interface and fully supports IMAP and SMTP protocols with SSL and STARTTLS encryption. Users can benefit from Sieve scripts for filters and vacation messages, all while maintaining minimal resource consumption. The system allows direct access to the mail server, meaning emails are not stored locally on the web server, which enhances efficiency. Additionally, users can link multiple accounts to a primary account, and the platform supports simultaneous access to different accounts in various browser tabs. It also accommodates additional identities and includes an administrative panel for easy configuration of main settings. With an incredibly simple installation and update process, RainLoop integrates seamlessly with popular services like Facebook, Google, Twitter, and Dropbox, while also allowing for effective folder management and straightforward customization of its look and feel. The platform boasts a configurable multi-level caching system and the ability to extend its functionality through plugins that can be installed via the admin panel. Moreover, it ensures perfect rendering of complex HTML emails and allows users to utilize drag-and-drop features for emails and attachments, making it a versatile and user-friendly choice for managing email communications. Overall, RainLoop Webmail provides a comprehensive solution that combines efficiency, ease of use, and modern features.

Group-Office serves as a comprehensive CRM and groupware solution for enterprises. This platform allows you to collaborate on projects, manage calendars, share files, and handle emails with both colleagues and clients seamlessly online. Designed for user-friendliness and full customization, Group-Office is an open-source application aimed at streamlining everyday office operations. With intuitive modules like Calendar, Address Book, Project management, and time tracking readily available, users can easily navigate their tasks. Additionally, there is flexibility for users to enhance Group-Office by creating their own custom modules, tailored to their specific needs. This adaptability makes it an ideal choice for businesses looking to optimize their workflow and improve overall efficiency.

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.

Provide Enterprise® by Groupware Technologies makes HIV care management easier, allowing you to prioritize what truly matters: the care of your clients. With over 14 years of experience supporting Ryan White-funded initiatives, our adaptable software is designed to handle the complexities of client care. It empowers managers to provide superior quality care more effectively by organizing, automating, and streamlining all facets of the management process. As a dedicated independent software vendor, Groupware Technologies focuses on designing, distributing, and supporting its unique care management software, Provide Enterprise. Our goal is to enable our clients to offer enhanced and more cost-efficient care through innovative process improvements and technological advancements. By leveraging our software, organizations can ensure that their resources are utilized effectively, ultimately benefiting their clients even more.

TWiki® serves as a versatile, robust, and user-friendly platform designed for enterprise wikis, collaboration, and web applications. It acts as a Structured Wiki, commonly utilized for managing project development environments, document storage systems, knowledge bases, or other collaborative tools, accessible via intranet, extranet, or the Web. Users who lack programming expertise can easily create their own web applications, while developers have the ability to enhance TWiki’s features through various Plugins. This platform significantly promotes information circulation within organizations, allows geographically dispersed teams to collaborate efficiently, and addresses the issue of outdated content typically associated with having a single webmaster. With over 700,000 downloads, TWiki is actively utilized by millions of users across more than 100 nations. Additionally, some extensive installations boast more than one million pages and accommodate upwards of 10,000 users, showcasing its scalability and effectiveness in diverse settings.

"Tiki certainly delivers." As a comprehensive Free / Libre / Open Source Web Application Platform, Tiki stands out with its extensive array of built-in features. If you can envision a functionality that operates within a browser, there's a good chance Tiki has it covered. With over a million downloads globally by corporations, governmental bodies, non-profits, and individual users, Tiki's adaptability and customizability enable a wide range of web applications to be created. For those in search of software capable of facilitating web experiences—be they collaborative or immersive—Tiki is undoubtedly worth your consideration. The Tiki Software Community Association is dedicated to nurturing the evolution of the Tiki Wiki CMS Groupware, ensuring that this free and open-source software is accessible to all who can gain from it. To understand the Tiki project better, you can explore its functionality and features, along with the numerous advantages it offers to its users. This exploration will give you a clear perspective on how Tiki can meet your web application needs effectively.

The versatile ECM solution, DOCUframe, serves as your all-in-one information and communication platform. DOCUframe provides intelligent assistance in areas such as customer relationship management (CRM), groupware, document management, and beyond! This advanced ECM system effectively supports users in document management, CRM, groupware, and inventory management. With its integrated development environment, users can customize the software to align with their company's specific workflows following appropriate training. It acts as the central hub for information and communication within your comprehensive solution. It includes features like address management for prospects, customers, suppliers, manufacturers, and employees. Additionally, there is management of contacts with designated representatives for each address, coupled with CRM functionalities and a document archive for storing all types of files. Furthermore, it facilitates product management, including product data for inventory control or integration with online shops, all supported by its object-oriented database. This seamless integration of features makes DOCUframe an ideal choice for businesses looking to streamline their operations.

OpenMeetings is a platform that offers features such as video conferencing, instant messaging, collaborative document editing, whiteboarding, and various other groupware functionalities. It leverages the Media Server's API for remoting and streaming capabilities through Kurento. This project is maintained by The Apache Software Foundation, and the previous website hosted on GoogleCode will no longer be updated. Currently, the Apache website serves as the sole source for the latest updates and information regarding the project. Users seeking the most recent enhancements and features should exclusively refer to the Apache site.

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.

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.

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.

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.

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.

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.

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.

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

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.

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.

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.