On Tue, 15 Jul 2003 11:57:48 +1000 Craig Sanders <cas@taz.net.au> wrote: > this is certainly possible in the latest postfix, but is not recommended due > to the risk of the filter (i.e. SA or clamav) not responding within a > reasonable time on a heavily-loaded system...which would result in SMTP > session timeouts and bounces or retransmissions of email. True. I was asking more for my own edification than any interest in the overall discussion. I doubt my machine would ever become so overloaded on that the mail it does handle would ever become in danger of having this happen. > (a lot of people want this, though....it was a feature recently added due to > popular request. i probably want it myself, but i have to do a lot of > testing before i decide whether it's worth the risks of implementing it on > my mail servers or not). Personally I love it in exim4/sa-exim. Cut down my spam load immensely and added the benefit of me block a good load of spam that was destined for a friend's machine for whom I am secondary MX. > what is recommended is to let the filter tag the incoming mail (as > spam/non-spam, virus/non-virus) and have the MDA either deliver, discard, or > bounce[1] the mail. I'd rather avoid MDAs if at all possible. People seem to think procmail is god, I see it as an unneeded step, esp. since I am more concerned for the few mail accounts I host for friends and family. They don't have shell access so editing their .procmailrc, the cornerstone of making procmail remotely useful, is moot. If I'm going to have a system-wide configuration might as well have it in the MTA and be done with it. > [1] bouncing (as opposed to SMTP 5xx rejecting) high-scoring mail is not a > good idea, as you end up clogging your queue with undeliverable spam > bounces....better to either deliver or discard. Quite so. I had not been cleaning out my exim3 queue like I should have. Well over 130 bounces frozen in just a few weeks. Since I started rejecting, none. -- Steve C. Lamb | I'm your priest, I'm your shrink, I'm your PGP Key: 8B6E99C5 | main connection to the switchboard of souls. | -- Lenny Nero - Strange Days -------------------------------+---------------------------------------------
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