Am 05.08.2011 21:24, schrieb Gary Chambers: > Jim, > >> I don't see a problem, other than people trying to deliver email to your >> MX to invalid recipients and from clients w/no rDNS. Your MX is >> rejecting >> them. > > My mail server handles a trivial amount of mail so I panicked upon seeing > the dramatic increase in log traffic. Further compounding matters is my > inexperience with what are likely commonplace occurrences on busier mail > servers. > >> "Backscatter" is when you *bounce* something to an alleged sender. >> You're >> not back-scattering, from what I can see, but merely rejecting. > > Thanks. Once the sick feeling in my stomach subsided and I started seeing > things a bit more clearly, I realized that I just probably had to ride it > out. > > Thanks for your help! > > Sincerely, > Gary Chambers
if you dont like any smtp connects from some servers block them with your firewall, this sure makes only sense if they are always the same , if your postfix server allready rejects it, and your bored of tons of logging, a dynamical solution would be i.e fail2ban etc -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
