Good morning - We have Exchange 2000 sp3 on Win2k sp3 server. We moved the server about a month ago from a clone system to a Dell machine (I installed software). One of our accociates in Korea can not send a message with attachments to us although they can send without attachments. The same is true in the opposite direction. Associates in other countries (Japan, Guam, Siapan, Australia) have no problems. I had the Korea emailer send a test to us and to another Exchange setup at another facility (same setup). We did not receive the test but the other facility did. If the other facility forwards to us we do receive the test. We don't limit size. Their attachment was about 6 files that totaled 300k. This was not a problem prior to the move. Any thoughts or suggestions would be greatly appreciated. thanks, Tom