Hi Craig, > 2. postfix does support filtering during the SMTP transaction. the difference > is that the postfix author tells you up front that it is inherently > problematic > (for *ANY* MTA, not just postfix) because of the potential for SMTP timeouts > if > the filter takes too long to run (SpamAssassin, for example, could take ages > to > complete regardless of whether it's run from exim or postfix...especially if > it's doing DNSRBL and other remote lookups), and he recommends that you don't > do it. > > other MTAs blithely ignore the potential problem and tell you to go ahead and > do it.
well, sa-exim does have timeouts for that and will just hard terminate the process if that's hit. So the point isn't fully valid as is. -(snip)- > i manage to avoid the problem by having good anti-spam/anti-virus rules (and a > huge junk map and set of body_checks & header_checks rules) that it rejects > about 99% of all spam during the SMTP session. very little makes it through > them to be scanned with amavsid-new/spamasssassin/clamav. still, i sometimes > think it would be nice to run SA at the SMTP stage. -(snip)- would it be possible to get the config sniplets of your server config as it seems to be pretty efficient...? Just as a reference like the exim4 config posted back in the other thread or this one. Thanks! -- Best regards, Kilian
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