---------- Original Message ---------------------------------- From: "R. Scott Perry" <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] Date: Wed, 17 Dec 2003 10:50:45 -0500
> >>I would like to tap the wealth of knowledge here for two DNS related >>questions. First, I had Imail setup as a secondary spooler for a >>company. I would see about 25,000 (1/15th of their daily total) messages >>pass through my server each day. Question 1: why, when their server is up >>and running without issues, do I see so many messages pass through me? > >Most likely, it's spam. Quite a few spammers realized that lots of primary >mailservers have anti-spam software, but backups do not. They hope that by >sending through the backup, their spam will get through. Most anti-spam >programs running on primary mailservers (like IMail v8's anti-spam) see the >E-mail as coming from the backup mailserver, which is a "safe" IP, and >aren't able to run any DNS-based spam tests on the E-mail. As a quick note on this, Declude does not suffer this problem if configured correctly. We have a backup mailserver that get hits by spammers hundreds of times a day. As the server essentially forwards any messages on, Declude still tests the message and catches any spam. -- Aaron Clausen [EMAIL PROTECTED] or [EMAIL PROTECTED] -- To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
