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Jeff Crosby wrote:
I get roughly 200-300 spam emails a day. 2 days ago Supportline pointed out
to me that I can add RBLs (Realtime Black Lists) to i5 SMTP. I added 3 RBLs
and immediately cut my spam by 90%. I now get about 20/day.
RBL's need to be used with care. Some of them are far more aggressive
than others.
I'm currently using: relays.ordb.org, bl.spamcop.net, dnsbl.njabl.org,
list.dsbl.org, cbl.abuseat.org, and opm.blitzed.org.
Make sure you put some reference in the rejection message that indicates
WHY the message is being rejected. Such as: "Rejected due to open
relay, see http://<url to rbl lookup>?ip=<client ip>". I've had people
tell me that they didn't realize they had an open relay, and a message
to midrange.com informed them of it.
FWIW: There is *NEVER* a situation where an open relay is a reasonable
solution. Any mail server that does not support authenticated or
restricted relay should be abandoned with all haste.
david
--
David Gibbs
david@xxxxxxxxxxxx
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