12 best free email server software

If you are looking for free email server software that does similar to Microsoft Exchange, you can use one of the following popular and reliable email server applications. These programs are beneficial particularly if you want to host and run your own email server. Using this method you can centralize, control and manage all mail services.

hMailServer (server)

Designed for Microsoft Windows, hMailServer is one of the best free email server software found on the net and used by several companies and institutions. All of the important tools that are needed to run an email server is included in hMailServer program. Also the software can easily be integrated with the existing webmail systems.

Features of hMailServer

  • Supports common email protocols such as IMAP, SMTP and POP3
  • Compatible with most email clients
  • Supports Microsoft SQL Server, PostgreSQL and MySQL
  • Includes spam protection and can attach to virus scanner to scan all incoming and outgoing email
  • Support SSL encryption
  • Support virtual domains, scripting and routing
  • Has built-in backup wizard
  • It is multilingual,  multihoming and much more features

Compatibility: Microsoft Windows server 2003, 2008, 2012


XMail Server Lite

Distributed under GPL license, XMail is free email server software that provides an Internet and intranet mail server capability. The application is built-in with most features we commonly found in the professional server software.

Features of XMail includes

  • Support ESMTP server, POP3 Server, Finger server (both server and client side)
  • Support multiple domain
  • DNS based maps check
  • Support spam protection
  • Synchronize POP3 accounts with external POP3 accounts
  • Account and domain aliases
  • Custom mail processing
  • Provides Multi-platform code and much more

Compatibility: GNU/Linux, OSX, Solaris, Windows NT/2000/XP

Website: XMail server software

MailEnable Standard

MailEnable is powerful mail server software that provide messaging and collaboration. MailEnable comes in four versions: Enterprise premium, Enterprise Edition, Professional Edition and Standard Edition. Among these applications the Standard Edition is a free email server software available for both personal and commercial usage.

Features of MailEnable Standard Edition

  • Provides SMTP, POP3 and web mail services
  • Support unlimited users and domains
  • Includes administration application such as mailbox quotas, redirections, auto-responders, import/export users, create groups etc
  • Includes fully functional list server
  • Has extensive security and authentication methods
  • Inline YouTube Player
  • Includes advanced diagnostics reporting utility
  • Allows interactive inline streaming of audio files (mp3)
  • Support anti-spam features that includes PTR record checking, DNS blacklisting, auto-banning of IP addresses
  • Works with a large variety of third party anti-spam software
  • Message tracking utility and scripting capability

Compatibility: Windows XP, Vista, Windows 7, Windows server 2003, 2008, 2012 (including 64 bit versions)

Website: MailEnable Standard Edition server


Xeams is a multiplatform, secure and free email server software comes with advanced features.  The software supports unlimited users and domains and built with spam/junk filtering tool. It runs in 3 different configurations: Full email server, Spam Firewall and Hybrid mode.

Features of Xeams email server software

  • Support web-based administration
  • Allows unlimited users and domains
  • Support multiple platform
  • Support 99% spam protection
  • Easy and auto updates
  • Archives messages
  • Support extensive reporting
  • Works with popular email clients such as Internet Explorer, Firefox and Safari

Compatibility: Microsoft Windows – 2000, 2003, 2008, XP, Vista, Windows 7/8, Linux, UNIX, Mac OS X, BSD

Website: Xeams eXtended Email and Messaging Server

SmarterMail Free

SmarterMail is a free email server software that provides the tools you need to manage small scale email hosting. The software includes web mail administration, antivirus, full collaboration, etc. In addition, SmarterMail offers a desktop client features like contacts, calendar and task.

Features of SmarterMail server software

  • Creates maximum 10 emails user account under one domain name
  • Provides web mail and web collaboration for 10 mailboxes
  • Access an email account from anyplace and anytime using standard web browser or email client
  • Manage and automate tasks using API
  • Alerts for dictionary attacks, watch bandwidth usage, email sent
  • Migrate your mail from any mail service such as Gmail, Hotmail, Yahoo, etc
  • Support synchronization of email, contacts, calendars with email clients
  • Provides strong anti-spam and anti-virus features
  • Multi-language functionality

Compatibility: Windows 7, 8, Windows Server 2003, 2008, 2012

Website: SmartMail Free Email server software 


CMailServer is a small and easy to use free mail server software that allows you to install your own email server. You can use to send and receive mails across the internet or within the Local Area Network (LAN). The software is particularly ideal for small and medium sized companies.

Features of CMailServer

  • Supports multiple domain names and SMPT authentication
  • Send and receive email via web browser
  • Provides independent SMTP, POP3 and Web Mail Service
  • Setup a number of mailboxes and allocate different storage size to different mailboxes
  • Allows users to register mailbox, change password and modify user info
  • Generate user mailbox info in different formats like html, INI, Excel, and txt
  • Can backup all the emails
  • Supports mail proxy and mail group
  • Supports all the popular email client software

Compatibility: Windows 2000, XP, Windows 2003

Website: Mail server CMailServer software 


Postfix is another free email server software that works like widely used sendmail program.

Features of postfix includes

  • Junk mail control
  • Support protocol
  • TLS encryption and authentication
  • Support database (memcache, SQLite, CDB, PosgresSQL etc)
  • Mailbox support
  • Address manipulation

Compatibility: AIX, BSD, HP-UX, IRIX, LINUX, MacOS X, Solaris, Tru64 UNIX, and other UNIX systems

Website: Postfix mail server

Cyrus IMAP

Cyrus IMAP is an enterprise mail system that employs standard based technologies. This free email server software can be used in independent email departments and in a large enterprise where a system is centrally managed.

Features of Cyrus IMAP

  • Uses IMAP protocol to access personal main and system-wide bulletin boards
  • Can be setup across multiple servers
  • Access to mail is through software using the IMAP, POP3, or KPOP protocols
  • Supports multiple  concurrent read/write connections to the mailbox
  • Support storage quotas on mailbox
  • Support IMAP version 4 network protocol
  • Support MIME internet standard message interchange format

Compatibility: Linux and BSD

Website: Cyrus Mail System


SquirrelMail is open-source and standards-based webmail application that supports the IMAP and SMTP Protocols. This free email server software allows to access email and address books from anywhere in the world. The application is licensed under the GNU General Public License.

The features of SquirrelMail

  • Includes all the functionality of an email client
  • Support MIME, address books and folder manipulation
  • Stable enough to use in production system
  • Compatible with browsers
  • Easy to configure and install

Compatibility: Windows Server 2003, 2008, Linux, Unix


Mercury Mail Transport System

Mercury Mail Transport system is a mail server software that allows you to send and receive mail from internet and LAN. This multi-featured software provides mail services for programs such as Outlook and Eudora. And it supports all major internet mail protocols. Mercury is free email server software but it is for non-commercial use.

Features of Mercury Mail Transport System

  • Support mail protocols including SMTP, POP3, IMAP4rev1, PH, PopPass, HTTP, SSL, etc
  • Support multiple domains on one system
  • Includes autoresponders
  • Support automatic forwarding
  • Support comparative mail filtering
  • Includes Bayesian spam filtering
  • Support for subscription-based mailing lists
  • Includes scheduling module features and much more

Compatibility: Windows 95, 98, NT4, 2000, XP, Vista, Windows 7 (under testing), Novel NetWare 3.x, 4.x, or 5.x file server

Website: Mercury Mail Transport System

Macallan Mail Solution for Windows

Written for personal use, Macallan Mail Solution is a free email server software designed for Microsoft Windows. The application manages local, incoming and outgoing emails. It supports the most common internet mail protocols.

Features of Macallan Mail solution

  • Supports protocols including SMTP, POP3, IMAP, HTTP, NNTP, TCP/IP, SSL
  • Employs advanced anti-spam (using DNS Black List) and virus reply mechanism
  • Popular mail clients are supported
  • Supports A POP, Login, Plain, CRAM-MD5 and NT LM authentication
  • Supports Web Administration and WebMail
  • Supports feeding
  • Works with SpamAssassin application

Compatibility: Windows 2000 and XP

Website: Macallan Mail Solution

Axigen Free Mail Server

The Axigen Free Mail Server software provides fast and secure email transfer, processing and delivery. It allows you to have free email for 100 users and free calendaring for 5 users. It requires free registration to download the software.

Features of Axigen free mail server

  • Supports POP3/IMAP email client such as Outlook, Mozilla Thunderbird or Apple Mail
  • Retrieve messages from external accounts such as Yahoo, Gmail
  • Allows to access your messages, contacts and calendars directly from your mobile device and smartphone
  • Support WebMail and administration
  • Includes multi-layer security tools including Authentication and Encryption, access control, blacklisting, white listing, greylisting, country filtering DNS Checks, Identity confirmation system, message acceptance, sending policies and much more
  • Integrates anti-virus (ClamAV) and anti-spam (SpamAssassin) mail protection tools
  • Easy installation
  • Support most popular browsers including Internet Explorer 8, Mozilla FireFox

Compatibility: Windows Server 2003, 2008 (32 and 64bits), Linux, BSD, Solaris

Website: the Axigen Free Mail Server

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