Preventing mail delivery from direct SMTP connection without a mail server.
Posted on 2006-07-13
I'm using MDaemon 8 and more then 80% of my email bandwidth is used from spammers, 50/60% of this comes directly from dial-up/cable/dsl users without using their ISP mail servers. All I want is to return a 550 code and close these connections before receiving the message itself, hence preventing lots of bandwidth waste with junk mail. With MDaemon it’s not really difficult to setup a rule to delete these messages, but only after the message has already been received. How to do this while receiving the headers, before the actual data?