I have a perplexing problem with our exchange server. It is sending out thousands of emails from the postmaster account. The message that is being sent is delivery status notification (failure). But these are the same messages that have been sitting in the account. These are not new messages. I noticed that there are a lot of smtp connectors and I try to clean the messages out of the smtp connectors and the queue just keeps filling up. I don't know what was the trigger for this action or how to turn it off. Any information would be greatly appreciated. I am using Windows 2003 Small Business server Premium edition. Exchange is part of the package. It is not the full blown exchange. There is nothing else running on this server. It is dedicated to email. what?

It sounds like you may have a virus infested machine on the network using Exchange as the mail server...or your being spammed by a reverse NDR scheme.I hope not, but you might want to check outFree phone support thatis available in the event of virus-related attacks affecting Microsoft products, through the toll-free 866-PC SAFETY (1-866-727-2338) phone number. John GilhamPrincipal Consultant Gilham ConsultingAdvanced Microsoft Solutions Web: www.Gilham.org

I don't really know Small Business Server, but see if you can enable Recipient filtering on the SMTP virtual server and tell it to only accept mail for recipients that are in the Active Directory. Sometimes you will see this type of behavior when you get a 'bot that is trying to do dictionary spamming to your server (just going through a list of common names @yourdomain.com.)Jim McBee - Blog - http://mostlyexchange.blogspot.com