Re: Restricting Incoming Email in Exchange by From Address

["Steve" <securityfocus () delahunty com>]

Not sure I follow on the first part.  Your users can connect to your
Exchange server via other clients like POP? If so, turn off POP/IMAP.  For
spoofing/phishing check out using reverse DNS lookups with Exchange and/or
SPF.  That will improve your overall email security.

STEVE
----- Original Message ----- 
From: "Greg Jones" <grjones () gmail com>
To: <security-basics () securityfocus com>
Sent: Saturday, June 18, 2005 12:30 PM
Subject: Restricting Incoming Email in Exchange by From Address


In Exchange (any version), I would like to disallow email coming from
the Internet (smtp) that has a From address of my domain.  This would
force our employees to use OWA or Exchange (via VPN of course).  This
would help with phishing and worms that are fooling some of our
employees (e.g., emails from admin () mydomain com).  Is this possible?

 Greg