Setup: SBS2000 using Exchange2000 and Outlook 2000. Service Pk1 installed, Exchange service Pk3 installed. Standard out of the box setup. Email uses SMTP to go and POP3 to come. 6 users on the system. Using Smarthost.
Problem: Two users cannot receive emails from certain outside people....one happens to be the wife of one guy. I can send them all emails from my site which is a totally different domain. My emails to them arrive where they should in their Outlook Inboxes. However two cannot receive emails from two(that I know of) specific places. These emails are being bounced with the message to the postmaster saying "Delivery Status Notification (Failure)" This is an automatically generated Delivery Status Notification.
Unable to deliver message to the following recipients, because the message was forwarded more than the maximum allowed times. This could indicate a mail loop."
Why can I send them an email and someone else cannot?
Help???!!!