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I got an Email from one of my customers who was having problems with an SMTP
Server being slow to respond (when you telnetted to port 25, the mail server
would take upwards of 2 minutes to show the SMTP banner).

This is the reason why:

----------------
Santa Ana winds in California took out connectivity for osirusoft's rbl
servers, and they're still unreachable today. Remove them, or everything
will either "time out" and be very slow or it will reject all mail
temporarily until the rbl works again.

I ended up disconnecting from osirusoft's rbl service that blocks spams,
and mapped to different ones which work, and the speed is now back
o normal.

I currently use (orisusoft currently disabled):

sbl.spamhaus.org Spammers and spam support
relays.ordb.org open relays
proxies.monkeys.com open proxies
formmail.monkeys.com formmail.pl blacklist
proxy.relays.osirusoft.com open proxies (down)
dynablock.wirehub.net dynamic addresses (dialup, etc)
opm.blitzed.org open proxies
dialups.visi.com dialup addresses
relays.visi.com open relays
-----------------

Sounds like Osirusoft's DNSBL may be having problems with connectivity so if
you are using it (or SPEWS), you might want to be carefull with that.

--
Yves Lacombe
SPAM Fighting Team
T4C/BMC Server Support
(514) 845-1666 ext. 300

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