On Tue, 2004-12-14 at 07:02, HaJo Schatz wrote: > To combat spam I have enabled reverse-DNS lookups of incoming SMTP > connections. If the FQDN does not match the HELO-Identity, I reject the > connection with a 550 Error. > > I have now found that this breaks communication even with reputable > (well, an international bank that is) peers. Dunno how much more mail I > may have lost through this... How are you out there handling that, are > you doing reverse-lookups? The best tool for combating spam that I have found so far is a combination of greylisting and spamassassin. Greylisting will block 95 to 98% of spam from ever getting on your sysstem. Spamsassassin catches most of the rest. If you are using sendmail I have used the milter-greylist package to provide greylisting. There are many others as well as versions for other MTAs. Highly recommended. -- Scot L. Harris webid@xxxxxxxxxx I have found little that is good about human beings. In my experience most of them are trash. -- Sigmund Freud
