Free Mail Servers
Free and Open Source Email Servers / Mail Transfer Agents
Free Mail Servers
The free mail servers (sometimes called Mail Transfer Agents, or MTA for short) on this page allow you to transmit email from one computer to another, using something called the Simple Mail Transfer Protocol, or SMTP for short. For example, it can receive email from an email client (software) and send it to another system. They can also allow email clients to retrieve its stored messages using either the Post Office Protocol, or POP3 for short, or the Internet Message Access Protocol, or IMAP. The email servers can either deliver the messages directly to the destination (end-to-end delivery) or relay them to another mail server for further transmission.
Please note the following:
The programs mentioned on this page are not for the ordinary email user. If all you want is a computer program that allows you to read and write email, please see the Free Email Clients page instead. On the other hand, if you want free email services (like webmail or the like), please go to the Free Email, Webmail, and Email Forwarding page.
If you are here because you want to put a contact form or feedback form on your website, please see the Free Feedback Form Wizard page instead.
Note that some of the software packages listed below are noted as being available only as source code. For non-programmers, in plain English, this means that the programs are distributed in a form that cannot be run directly on your computer. It has to be converted into a machine-readable form using a process known as "compilation" — that is, in programming lingo, you will need to "compile the program" before it can be used. For most non-programmers who only want to set up and use a program rather than muck around with technical stuff, this basically implies that you should probably skip that particular piece of software and look for another one that comes with a ready-to-run package.
Related Pages
- How to Make / Create Your Own Website: The Beginner's A-Z Guide
- Free Internet/Network Bandwidth Monitors and Meters
- Free Hard Disk Backup and Restore, Hard Disk Image and Cloning Utilities
- Free Secure File / Disk Deletion (Wipe) Utilities
- Free Mailing List Hosting and Email Newsletter Hosting
- Free Encrypted Email, Free Encrypted Chat
- Free SSL Certificates for Websites/Web Servers
- Free/Open Source Web (HTTP) Server Software
Free Mail Servers (Email Servers / Mail Transfer Agents)
- hMailServer (Windows)
This mail server for Windows, hMailServer, supports the SMTP, IMAP and POP3 email protocols. It also includes a score-based spam filtering system (SpamAssassin) and can be integrated with antivirus software (to scan incoming and outgoing email). Other features include support for server-side rules, SSL, multihoming, virtual domains, routing, built-in backup, etc.
- Mercury Mail Transport System (Windows, Novell NLM)
Mercury supports the following protocols: SMTP, POP3, IMAP (IMAP4rev1), SSL (for SMTP, POP3 and IMAP), PopPass, HTTP (for mailing list management), finger and PH (for directory lookups). It can handle multiple domains on one system, supports aliases, autoresponders, forwarding, filtering, Bayesian spam filtering, mailing lists, multiple queues, domain mailboxes (that receives all mail sent to a particular domain), customisable ("customizable" in US English) notifications (such as delivery failure messages), greylisting, relaying, killfiles, blocklists, full session logging, the ability to listen on multiple ports, the ability to relay messages via SMTP or use full end-to-end delivery, the ability to restrict which connections are allowed (based on address range), etc. (This is just a subset of the list of features available: the full list is too long to mention here. Please see their site or documentation for details.) This mail server is only free for private or non-profit use.
- Apache James (Windows, Mac OS X, Linux)
Apache James is a mail transfer agent ("MTA") that implements POP3 and SMTP. IMAP support has been added to the version 3 series of the software, which, at the time I write this, is still under development. The software can also function as an NNTP news server. The software is written in Java, which means that it can run on any system that has a Java Virtual Machine installed.
- Citadel (Linux)
Citadel is actually a groupware program (with instant messaging, bulletin boards, shared calendars, mailing list server, etc), but it is listed here because it includes an email server. It supports ESMTP, POP3, and IMAP, and also includes a webmail interface. Access to your email over TLS/SSL is also supported. It has built-in spam filtering with support for things like blacklists, SpamAssassin, and an antivirus. Binary packages for Debian/Ubuntu Linux are available. For all other Linux users (or perhaps also users of other Unix type systems, including Mac OS X), you will need to compile the program yourself from the source code.
- Postfix (Unix-type systems) (Source code only)
Postfix is a mail transfer agent with support for SMTP, DKIM, DomainKeys, SenderID, TLS encryption and authentication, junk email filtering, etc.
- qmail (Unix-type systems) (Source code only)
This software, qmail, is an SMTP server for Unix-based systems like Linux (and presumably also Mac OS X). It was written to be a secure replacement for sendmail (another mail server). It also provides a POP3 service.
- Sendmail (Unix-type systems) (Source code only)
Sendmail supports SMTP, ESMTP, UUCP, etc. It is known (or perhaps more accurately, notorious) for being hard to configure, the result of its attempt to provide the administrator with the ability to control many things.
- Qpopper (Windows [with cygwin], Mac OS X, Linux) (Source code only)
Qpopper supports POP3 and TLS/SSL. It also features authentication via login name/password, APOP, Kerebos and PAM. As far as I can tell, it does not implement any support for SMTP, which means that you can send outgoing mail through this email server from your email software. It is released as source code, so you will need to compile the program into an executable before you can use it.
Related Pages
- Free Data Recovery, File and Partition Recovery, Undelete and Unformat Software
- Free Anonymous Surfing and Proxies
- How to Register Your Own Domain Name
- Which Web Host Would You Recommend? (FAQ)
- How to Add a CAPTCHA Test to Your Feedback Form Script: Reducing Spam in Your Contact Form
- Free PHP Mailing List Scripts
- Free Antivirus Rescue CDs and DVDs
- Free Spyware Detection, Removal and Prevention
Can't Find What You're Looking For?
Search the site using Google.
Newest Pages
- How to Add a Contact Form (Web Form) to Your Website Using Dreamweaver CS5.5
- How to Efficiently Manage a Multi-Page Website with Dreamweaver CS5.5
- How to Reserve a Domain Name. Do You Need a Web Host if You Want to Reserve a Domain for Future Use?
- How to Customize the Navigation Menu on Your Website with Dreamweaver CS5.5
- What's the Difference Between a Content Management System (CMS), a Blog, a Web Editor and an Online Site Builder?
- Free Image/Photo Slide Show JavaScript
- Free GUI Builders, Application Builders and Rapid Application Development (RAD) Software
- HTML Tutorial - Learn to Design a Website using HTML
- How to Centre a Background Image or Photo on Your Web Page Using KompoZer
- How to Create Rounded Corners for Your Box Borders in CSS
- How to Set Up a Standard User Account (or Limited Account) on Windows Vista and Windows 7 for Daily Use
Popular Pages
- How to Create/Make Your Own Website: The Beginner's A-Z Guide
- How to Register Your Own Domain Name - how to get your own domain name
- Dreamweaver CS5.5 Tutorial: How to Design a Website with Dreamweaver CS 5.5
- How to Create a Bootable Windows XP Setup CD/DVD on a Preinstalled Windows System
- Free Partitioning Software - Copy, Create, Move, Resize, Convert, Undelete Partitions
- Free Data Recovery, File and Partition Recovery, Undelete and Unformat Software
- How to Create an Emergency Windows Rescue CD
- Free DVD Authoring and Creation Software
- Free CD and DVD Burners and Copying Software
- Free Hard Disk Backup and Restore, Hard Disk Image and Cloning Utilities
How to Link to This Page
It will appear on your page as:
Free Mail Servers (Email Servers / Mail Transfer Agents)
