Does Exim cache results of eg verify = sender/callout ?
See the below. The linux-kernel postmasters are people I'd like to see
staying happy :)
Matt
---------- Forwarded message ----------
Date: Tue, 3 Sep 2002 00:50:19 +0300
From: Matti Aarnio <matti.aarnio@???>
To: linux-kernel@???
Subject: Stupid anti-spam testings...
Quite a many of vger's recipients are doing return-path verification
testing for SMTP's MAIL FROM address.
I would not mind that, EXCEPT that those bloody stupid things don't
have any sane caches at all! VGER is sending 300+ messages per
day to 3500+ recipients of linux-kernel list EVERY DAY, and every
outgoing message is now getting oodles of those probes!
Folks, when you deploy that kind of testers, DO VERIFY THAT THEY
HAVE SANE CACHES! A positive result shall be cached for at least
two hours, a negative result shall be cached for at least 30 minutes.
That would send a dozen back-probes towards vger from recipient
system, instead of present 300+ !
/Matti Aarnio -- who considers some cures worse than the original problem...
