Talk to the folks at that external domain and ask them to try to connect to your mail with telnet on port 25 from their mail server - see what they get. Or ask what kind of NDR, failure or warnings they are getting.
________________________________ From: Angie Urtel [mailto:[EMAIL PROTECTED] Sent: Monday, March 10, 2008 1:50 PM To: MS-Exchange Admin Issues Subject: Re: 2007 Message Tracking - holes? ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
