Michael Katz schrieb: > Tomasz Chmielewski wrote: >> Martin J. Boeck schrieb: >>> Hi! >>> >>> I was thinking about this some time ago. The problem would be, that >>> you have to accept the message to scan it for a spam level with >>> amavis. So you cannot reject it anymore. >> >> No, you're wrong - just do before-queue filtering. For example, for >> Postfix, you'll find instructions here (Postfix Before-Queue Content >> Filter): >> >> http://www.postfix.org/SMTPD_PROXY_README.html > > Pre-queue content filtering is the worst of all worlds
I kindly disagree. > - you lose the > benefit of pre-queue filtering by accepting smtp data What do you mean by a) "pre-queue filtering" and b) "pre-queue content filtering"? You mean by a) only the SMTP commands sent (IP, sender, recipient, RBLs etc.). But b), or "pre-queue content filtering", doesn't exclude it. > while losing the > benefit of postfix smtp scalability since you are putting a resource hog > in the smtp process. Is this claim valid? In both cases, you have exactly the same amount of mails to filter. In "pre-queue content filtering" you need to have enough resources to do the filtering during the connection, it's all a function of the amount of emails and the processing power of the filtering server... > You do gain the marginal benefit of being able to > reject spam that content filters find and smtp level tests do not > identify, but many sites quarantine or discard or mark spam rather than > rejecting, so this is only a benefit for some sites. I wouldn't call it a "marginal benefit" - it's really important. It also means your mail server doesn't have to deal with delivering of bounces/reject messages that have false senders; also, your server doesn't send those bounces/reject messages to all innocent people who just happened to be in some spambot's FROM: field (rejected spam mails, rejected mails with viruses etc.), so ironically, it also saves some resources. -- Tomasz Chmielewski http://wpkg.org ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ AMaViS-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/amavis-user AMaViS-FAQ:http://www.amavis.org/amavis-faq.php3 AMaViS-HowTos:http://www.amavis.org/howto/
