* Adrian 'Dagurashibanipal' von Bidder ([EMAIL PROTECTED]) wrote: > <plug> > And, of course, postgrey as the very first line of defense. > </plug> > Coupled with the usual checking on HELO (blocking 'localhost' HELOs and my > own IP does wonders!), SMTP protocol conformance (pipelining), sender > (envelope) address checking.
Things which increase the load on the remote mail servers are *bad*.
That would include responding with temporary errors unnecessairly and
adding unnecessary delays in communication. pipelining by itself isn't
necessairly terrible- adding things like 2 minute delays is bad though.
Stephen
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