New attack = New rules.

Spammers continue forgering "From:" address in massive email sents pointing it to us. At this time we are suffering a new wave. The bounces come all to Pookmail front MTA-server so we decided to start denying certain origin address to avoid extra traffic and fool inserts in our database from bounces of emails that we DONT sent.

At this time we are rejecting 5 SMTP connection per second from postmaster@ or mailer-daemon@ informing with a 550 error that bounces are not admited and for "further and human information contact pookinfo" at our domain.

We can't reject mail from null sender like "mail from: <>@at.any.host" usually containing bounces without violating RFC 821 as stands here.

Service remain unaffected and fully operative