Summary: I realize that the problem most likely is not due to postfix (thus the OT in the subject), but I figured someone here might have seen this before
Server is live and fully functional. it deals with thousands of messages per day and has for over a year. One user can't receive messages from one contact. That contact doesn't even show up in the logs as spam or lost connection or anything. not previously stated, but I can't find my server name or IP address on any blacklists, and I did confirm that the email address was correct. the recommendations made (please correct me if I'm wrong or tell me if I'm missing anything): 1) have a message sent to another account on same server 2) "smtpd_delay_reject = yes" is set, so try to figure out sending ip address and search for it in maillog. 3) get administrator of sending server to check his logs 4) pcap during a communication attempt 1 is easy, I'll do this one. I think I can do 2. i've already asked for 3 to be done, but it's out of my control. I'll do number 4 if It comes down to it, but frankly I've never done anything with packet capture and it's a little intimidating. Thanks everyone for your input. If I get a resolution, I'll post back. Ray
