Block outbound email

Posted on 2009-07-06
Medium Priority
Last Modified: 2012-05-07
I have a Cisco ASA 5520 and I would like to block all outgoing SMTP that's not from the mail server.  What's the command to do so?
Question by:jfahern
LVL 11

Accepted Solution

rvthost earned 2000 total points
ID: 24790714
access-list InsideACL extended permit tcp host x.x.x.x any eq smtp (where x.x.x.x is the ip of your mail server)
access-list Inside ACL extended deny tcp any any eq smtp

Ref doc:


Author Closing Comment

ID: 31600439
That was fast, thanks!

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