Re: [cobalt-users] sendmail - deferred connections

["Ted" <ted@xxxxxxxxxxxxxxx>]

I had similar issues , and its called harvesting. Its were companies
directory harvest customer bases. Due to amount of increase
'of this type of activity we eventually outsourced the
filtering to postini.

For 25 cents per email account holder, it was well worth the piece
of mind. When they start harvesting now Postini places the IP into
a spammers list and block further connections to the mail server.

Sure wish we knew how they built this filter as well. Any ideas?
Does Spam assassin stop directory harvesting ?



----- Original Message ----- 
From: "Manny Tau" <mtau@xxxxxxx>
To: "Cobalt-Users listserv" <cobalt-users@xxxxxxxxxxxxxxx>
Sent: Saturday, November 15, 2003 10:03 AM
Subject: [cobalt-users] sendmail - deferred connections


> Seems for some reason that the last week my 550 is having probs with email
> accounts, and a large number of emails have been "deferred: connection
timed
> out" with different mail servers of various recipients.
>
> The amount is a lot higher than the occasional.
>
> Is there something going lately with mailservers out there (worms, etc),
or
> is this something on my box. Haven't done anything to the 550 in the last
> couple of months...no patches, etc, and it does have the security package
> from SolarSpeed, which tells me that there continues to be a heck of a lot
> of port scanning activity the later part of this year.
>
> What would be the various sendmail files I need to look into?
>
> Thnx for any suggestions on how to look into this....Manny
>
>
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