lately, since adding a fairly active domain to my SIMS setup, i've
been getting a pretty constant flood of bad messages - a fairly
persistent dictionary attack on this one domain in particular. i have
the feeling their old host had a catch-all alias on their domain before.
anyhoo, two questions:
1> is it possible to mitigate or stop the dictionary-style spams from
effecting my server? they're all routed to error or stopped by
blackholes, but they still take up SMTP channels, and the server is
delaying other mail to deal with them
2> is there a reason why, after a few hours or days of this, the SMTP
part of SIMS would simply stop responding? i can see it in the logs -
it handles SMTP fine, delivering/bouncing/routing messages one
minute. the next minute, it's crickets. POP still handles connections
and delivers mail to clients that log in, but i have to restart SIMS
to get SMTP to respond.
any thoughts?
(i know, i know... i said a while back that i was in the process of
migrating away from SIMS - i went with EXIM on a mac mini - but
hardware problems with the mini set me back a couple of weeks.
anyhoo, the SIMS server isn't retired yet, and i'd like to keep it in
service for another few weeks at least.)
Charles Mangin
Option8: Making Macs happy since 1999.
[EMAIL PROTECTED] | http://www.option8consulting.com
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