Creating a Mail Server on Ubuntu (Postfix, Courier, SSL/TLS, SpamAssassin, ClamAV, Amavis) « Pixelinx. Sep82013 After the exposure and feedback I received from my previous guide, I felt it was about time you deserved an update.
This guide is now compatible with Ubuntu 13.04For earlier versions: Creating a Mail Server on Ubuntu (Postfix, Courier, SSL/TLS, SpamAssassin, ClamAV, Amavis) Once again, credit where credit due: Thanks again to Ivar Abrahamsen for his guide which is, by far, one of the best ones out there. The Postfix Home Page. SASL Howto. How Postfix uses SASL authentication SMTP servers need to decide whether an SMTP client is authorized to send mail to remote destinations, or only to destinations that the server itself is responsible for.
Usually, SMTP servers accept mail to remote destinations when the client's IP address is in the "same network" as the server's IP address. Jimsun.linxnet.com/misc/postfix-anti-UCE.txt.