E-MailRelay

E-MailRelay is an e-mail store-and-forward message transfer agent and proxy server. It runs on Unix-like operating systems (including Linux and Mac OS X), and on Windows.

E-MailRelay does three things: it stores any incoming e-mail messages that it receives, it forwards e-mail messages on to another remote e-mail server, and it serves up stored e-mail messages to local e-mail reader programs. More technically, it acts as a SMTP storage daemon, a SMTP forwarding agent, and a POP3 server.

Whenever an e-mail message is received it can be passed through a user-defined program, such as a spam filter, which can drop, re-address or edit messages as they pass through.

For Windows download "emailrelay-2.2-w64.zip" and run "emailrelay-setup.exe" for the graphical installation program. On Linux install the "deb" or "rpm" file, or build from source:

./configure.sh
make
sudo make install

For more information visit the E-MailRelay website:

https://emailrelay.sourceforge.net