Best Free Mail Servers of 2024

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

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.

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.

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.

Analyzes all web traffic, blocks selected websites via HTTP or HTTPS using Squid proxy. Integrated with ClamAV antivirus. Multi-domain web server with ready-to-use LAMP stack. Virtual hosting allows you to host multiple domains on one server. NextCloud allows you to access your files from anywhere, whether you're on the internet, your computer, or your mobile device. Mattermost allows you to create a private Slack-alternative. Secure team collaboration is possible with this open-source messaging platform. Cockpit is a modern web interface that simplifies administration tasks. It's easy to install and very fast. CentOS/RHEL is a popular server distribution that is trusted by routine security updates and has rock-solid stability.

Your customers can enjoy secure, business-level email hosting and other value-added services. This is a great solution for SPs and can be used by thousands to millions of users. You can acquire new customers by offering a premium mail server solution that allows you to automate your existing infrastructure. A secure and powerful mail server allows you to manage your email, share and organize your calendars, and sync your mobile devices. This is the perfect solution for businesses of any size. Axigen is very knowledgeable. Take a look inside to see which hats it has on. You can manage your email and make it easy to get things done with tasks, calendars, and notes. Desktop usability is possible in your browser using keyboard navigation and shortcuts. Drag-and-drop, live email list view, frequent folders. Email filters. Out-of-office messages. Individual blacklist /whitelist.

SOGo is a trusted and fully supported groupware server that focuses on scalability, open standards and trust. SOGo is available under the GNU GPL/LGPL version 2 and higher. SOGo is a rich AJAX-based Web application that supports multiple native clients by using standard protocols like CalDAV (CarDAV), CardDAV (GroupDAV) and Microsoft ActiveSync. SOGo is the missing piece of your infrastructure. It sits in the middle your servers to provide a consistent and complete interface for your users to access their information. It has been used in production environments with thousands of users.

Open source softwares are the best way to build a mail server. Works on CentOS Stream (Rocket, Alma), Debian, Ubuntu and FreeBSD. You can deploy a FREE, OPEN SOURCE, FULLY FURNISHED, FULL-FEATURED email server in a few minutes. We did all the heavy lifting by combining open source components and applying best practices. Our product takes care of all the major tasks. We also offer professional support in case of any problems. You can control email security and view the transaction log. No one else can read the content of your messages. All components in iRedMail come from open source softwares. You get bug fixes and updates directly from the Linux/BSD vendors you trust. iRedMail allows you to build a mail server using open source softwares.

Mail-in-a Box lets you create your own mail service in just a few simple steps. It's like creating your own gmail that you can control from the top down. Mail-in-a Box is a cloud computing service that turns a new computer into a functioning mail server. You don't have to be a tech expert to set this up. Mail-in-a Boxes include webmail, an IMAP/SMTP Server and desktop mail software. It also includes calendar and contacts synchronization. The box includes standard mail functionality such as spam protection (spam filters and greylisting), email client auto-configuration, mail filter rules, and automated backups via Amazon S3 or other services. When you choose to let it be your nameserver, the box will also automatically configure DNS records that are important for mail deliverability, security, and other factors, such as SPF, DKIM DMARC and MTA STS. DNSSEC (with DANE TLSA enabled) provides a higher degree of protection when enabled.

Installing your own email server will give you more control and privacy. It takes less than 10 seconds! Modoboa allows you to create your own mail server in just 10 minutes. You have a few options when it comes to creating a mailbox: - Subscribe to the services of infrastructure providers such as OVH and Gandi ...) or Internet providers like Orange, Vodafone ...). The customization and configuration options, domains, and mailboxes are limited. Use free email services (Gmail , Live, Yahoo ) which are limited in their functionality and your data may be used for commercial purposes. Install your own email system. This requires a good amount of technical knowledge in order to set up and configure the system. Modoboa offers an alternative to these 3 options. It allows you to create your own secure email server and is independent of email providers. It's all done in less than 10 mins and for free.

Mailu is an easy-to-use, yet powerful mail server that comes as a Docker image. It is open source software, which means it's free (as in free beer and free speech), and is open to external contributions. The project aims to provide people with an easily configured, easily maintained, and full-featured email server without shipping proprietary software or unrelated features that are often found in popular groupware. The main features include: Standard email server with IMAP, IMAP+, SMTP, and Submission profiles for clients Advanced email features: aliases and domain aliases. Custom routing Webmails, multiple access to webmails, and administration interface User features, aliases auto-reply and auto-forward. Fetched accounts Admin features, global admins, announcements, per-domain delegation, quotas Security, enforced, TLS, DANE MTA-STS Letsencrypt, outgoing DKIM Anti-virus scanner Snuffleupagus Block malicious attachments Antispam, auto-learn, greylisting, DMARC& SPF, anti-spoofing

hMailServer for Microsoft Windows is a free and open-source e-mail client. It is used by Internet service provider, companies, government, schools, and enthusiasts around the world. It can be easily integrated with most existing webmail systems. It offers flexible spam protection based on scores and can be attached to your virus scanner for scanning all incoming and departed email.

MailEnable is a complete solution that provides secure email and collaboration services. MailEnable is the most popular Windows Mail Server Platform according to a recent independent survey. MailEnable is a solution for small businesses and hosting companies that provide email services to thousands end users. MailEnable is a Windows Mail Server with features similar to Microsoft Exchange. It offers powerful messaging services such as Exchange ActiveSync, IMAP and SMTP and collaboration tools like calendaring, contacts, tasks, and notes.

Email, collaboration, groupware and content management can be set up in minutes on your own hardware or in the cloud. Citadel's exclusive room-based architectural design makes it easy, versatile and powerful. No other platform combines so many features with such ease using this familiar and consistent analogy. Citadel is open source software that uses the GNU General Public License. It's not some crippled version of an expensive "enterprise edition". All the software available here is free and of the highest quality.

James is the Java Apache Mail Enterprise Server. It is based on a modular architecture that consists of a set of modern, efficient components. This provides a stable, secure and extendable Mail Server running on JVM. You can create your own solution for email treatment using the Inversion of Control platform and customize filtering and routing rules with the James Mailet Container. The Apache James project combines the libraries that make up James to create running services. These are available for download from the Apache mirrors.

Horde is the world's most flexible groupware, making it the ideal platform for building your business productivity software. Horde is the only open source groupware that connects to and supports more backends than any other system. This allows you to continue using your existing userbase, and your users will not need to remember any new passwords. Horde's feature-set rivals that of the largest enterprise email system. We have a feature set that is superior to any other competitor in our primary apps, such as mail, calendar, and address book, and even more in secondary apps, such as time tracking, wiki and ticketing.

Relay restrictions have been completely rewritten with an easier-to-use interface that allows for finer control of relay security. EIMS has its own domain name resolver, which fixes bugs in the Open Transport DNR as well as performance issues with the OS X DNR. The new DNR currently does not support non-recursive domain names. SMTP Submit Port, this is a secondary SMTP port that runs on TCP port 587. It currently functions exactly the same way as the standard SMTP. This is useful for clients who are behind an ISP which blocks port 25 access. Sending Setup option to set maximum recipients per message. You can now turn off the Expand SMTP addresses option. This was always on in EIMS 3.1. The SMTP (both port 25 or 587) server now reports Telnet and connections that appear to be port scans (connections with no data sent and where it doesn't stop timer).

Haraka can handle thousands of connections simultaneously and deliver thousands messages per second. Haraka and its plugins are both written in asynchronous JS, and are therefore very fast. Haraka is a very good filtering MTA and has excellent spam protection (see the plugins). It also works as an MSA on port 587, with auth and Dkim_sign enabled. Haraka does not claim to be an IMAP or LDA server (like Dovecot, courier or Dovecot), or a mail store like an exchange (or postfix/exim/qmail). Haraka is commonly used with these systems. Haraka comes with a built-in scalable outbound delivery engine. Mail marked for relaying (e.g. via an auth plugin), is automatically queued up for outbound delivery. Haraka's plugin-based architecture allows for an easily extensible MTA to complement traditional MTAs, which excel at managing mailboxes but lack sufficient filtering.

OpenSMTPD implements the server-side SMTP standard as defined in RFC 5321 with some additional extensions. It allows machines to send and receive emails from other systems that use the SMTP protocol. OpenSMTPD was born out of dissatisfaction over other SMTP implementations. It is a complete SMTP implementation. OpenSMTPD was developed primarily by Gilles Chehade, Eric Faurot and other OpenBSD hackers.

Dovecot is a great choice for both small- and large-scale installations. Dovecot is one of the fastest IMAP servers, and it still supports the standard Maildir and mbox formats. Dovecot's high performance is due to the transparent indexing of mailboxes. Dovecot is compliant with standards. Dovecot is compliant with all IMAP server standards. Dovecot's Indexes are automatically optimized. They contain only what the client of the user needs most often, nothing more or less. Dovecot has self-healing capabilities. It fixes most of the problems that it finds on its own, like broken index files. The problems are logged, however, so that the administrator can try to determine what caused them later. Dovecot strives to be administrator-friendly. The common error messages are as clear as possible.

Mailcow: Dockerized is a free and open source groupware/email system based on Docker. Mailcow is based on a number of well-known and long-used components that, when combined, result in a carefree email server. Each container represents an application connected by a bridged network.

In a few minutes you can install a fully-functional mail server, while scripts do the rest of the work. The package is designed to be easy to use, with defaults that are reasonable. This allows you to get up and running quickly without having to learn the internals or make decisions that may break your email system. Binaries and user data are strictly separated. The user database is stored as a SQLite database in a file. Poste.io is therefore fully compatible with external storage. Migration, backups or upgrades are therefore very simple and mainly consist of file manipulation. Poste.io was built with security at the forefront. Internet history is full of painful security incidents. We traded in old email client compatibility for features that are more secure and meet modern security requirements.

Courier's mail transfer agent (MTA), an integrated mail/groupware service, is based on commodity open protocols such as ESMTP and IMAP. It also supports SSL, LDAP and HTTP. Courier offers ESMTP, IMAP and POP3 services, webmail and mailing lists within a single, consistent framework. Individual components can easily be enabled or disabled. The Courier mail module now integrates basic web-based scheduling and calendaring services into the webmail module. Soon, advanced groupware calendaring will be available. The Courier mailserver's source code should be able to compile on all POSIX-based kernels, including Linux and BSD. The Courier mailserver should also compile under Solaris and AIX with the help of Sun's or IBM’s freeware addon tools for each operating system. The Courier mailserver evolved from several related projects that were merged together (more about that later). The Courier mailserver implements SMTP extension for mailing list management.

Cyrus IMAP serves as an email, calendar and contacts server. Cyrus is open source and free. Features: Speed up Security Efficiency Search Engine CardDAV and CalDAV Support Data storage that is robust Replication Scalable for large installations Sieve provides flexible filtering support Supports anti-spam and antivirus toolkits Handles deliverability: SPF, DKIM, DMARC Cyrus SASL offers a wide range of authentication options JMAP Support List of standards supported