E-MailRelay Icon


SMTP email proxy and relay server

4.4 Stars (7)
1,977 Downloads (This Week)
Last Update:
Download emailrelay-1.9-src.tar.gz
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E-MailRelay is a simple SMTP proxy and relay MTA, written in C++, for Linux and Windows. As a proxy all messages can be passed through a user-defined program, such as a spam-filter, which can drop, readdress, or edit messages as they pass through.

E-MailRelay Web Site


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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Great solution if you have a huge amount of SMTP requests from different servers and pcs in your company to the same SMTP server on the web. Providers often limit the ammount of concurrent requests from the same outgoing IP. With this nice tool you can get rid of annoying 421 error messages, Catch them all and relay them every 30 seconds or so and you're fine.

    Posted 08/15/2016
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Great and helpful software. I will recommend it to my colleagues sysadmins. Developer responded to bug report promptly with solution and bug-fix/solution add. It would be nice to have packages for rmp and deb platform created after bug-fix or feature added but it is not crucial.

    Posted 02/02/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    I love this software! Absolutely amazing that it is free! I use this software to run a local smtp server without authentication for forwarding "Intel Rapid Storage Solution" messages which only supports server without smtp authentication. THANK YOU SO MUCH!!!!!

    Posted 11/04/2013
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    emailrelay-gui.exe is being detected as TR/Dropper.gen trojan by Avira Antivir, VirusTotal is not seeing this overall but is detected once the emailrelay-1.8.1-setup.exe is opened. Even scanning the emailrelay-1.8.1-setup.exe directly with Antivir doesn't find anything, but once its extracted... And yes the download came directly from SourceForge. http imageshack.us / photo/my-images/443/dp0i.png/

    Posted 07/05/2013
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    very easy to configure, so useful, nice application!

    Posted 06/13/2013
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Additional Project Details



Intended Audience

Developers, System Administrators

User Interface

Non-interactive (Daemon), Win32 (MS Windows)

Programming Language




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