Educause Security Discussion mailing list archives

Re: Filtering outgoing email


From: Joe Vieira <jvieira () CLARKU EDU>
Date: Tue, 23 Jun 2009 12:03:49 -0400

We've had good luck with it. Anytime we see a address that isn't in the
list we add it and so do tons of other folks.

It really does't do anything to slow our mail down... just a big ol'
postfix map. postfix is super fast. antivirus scanning is the limiting
factor in mail delivery usually.

If you environment is already at capacity then you might have issues,
but other than that i doubt you would see any issues.

Joe

Roger Safian wrote:
At 09:46 AM 6/23/2009, Joe Vieira put fingers to keyboard and wrote:

the first of which is
http://code.google.com/p/anti-phishing-email-reply/ the use of this. We
loop outgoing mail thru another postfix instance to filter based off
this project's list of phishing reply addresses. If you mail to a known
phisher, your mail gets dropped. good protection.


Any idea what the impact of using this has on the timeliness of mail
delivery?  With phishers being able to choose almost any return address,
this seems like a galactic scale game of whack a moll.  ;-)  I worry
that our servers couldn't handle the additional load.






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