Postoffice

Postoffice is a powerful software that serves both as an SMTP mail server and client, that was created with spam blocking in mind. With its greylist feature, you can be sure that the rate of incoming spam is significantly slowed down. Additionally, Postoffice allows for antivirus checking on incoming mails, via the sendmail milter protocol or a traditional hard-coded AV program.

Postoffice goes further to support vm-pop3d-style virtual domains, enabling the delivery of mail accounts within these domains. Moreover, with the support of AUTH LOGIN, Postoffice allows people inside virtual domains to use it as a mail forwarder when replying to mail.

In terms of ease of use, Postoffice provides a user-friendly command line interface that accepts many of the same options that are passed to sendmail. Plus, it comes with a pack of sendmail compatible aliases, including runq, mailq, newaliases, and sendmail.

The recent release of Postoffice ensures that it is now easier to compile without complaints, especially if CC="gcc -Wall". There are no new features in this release, but it guarantees a better user experience. Overall, Postoffice is the ideal mailing software for anyone looking for a reliable and efficient mailing system with spam blocking capabilities.