Possibly setup a separate SMTP connection, block any IPs except those certain internal ones, and force authentication. Most scripts and software that use SMTP alerts allow for authentication.
From: Barsodi.John [mailto:[EMAIL PROTECTED] Sent: Thursday, April 24, 2008 12:59 PM To: MS-Exchange Admin Issues Subject: Internal SMTP relaying via Exchange Just curious how you guys handle internal SMTP relaying via Exchange? We have several internal apps and developers building notification mechanisms and right now it's free reign to bounce messages off the Exchange system. I will be keeping everything locked down on our new Exchange 2007 boxes and put a method for approval. I would prefer select servers be allowed to relay, but I have developers saying they have 4 desktops that they need to be able to relay. Drives me up the wall because that exposes some serious risk if someone decided to get malicious and use these for external spamming. I was just curious how other admins/companies were handling this issue? - John Barsodi ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
