The FreeBSD Diary
Providing practical examples since 1998
Postfix
mailwrapper exited on signal 11
Obscuring smtp auth headers
Virus scanning
Postfix – setting up two outgoing mail servers
Is your ISP blocking port 25? Here’s a Postfix solution.
Postfix – virtual domains (part II)
Using foo+bar@ email addresses with Postfix and procmail
Postfix – virtual domains