Hi guys In my work please we use school program and every client need to send email. We have exchange 2003 , so client was able to send email to anyone via exchange 2003 server with our domain ( of course I have already set it up before ) . Anyway recently we can't send email via exchange 2003, I checked all setting , it seems everything is ok . I used outlook 2007 , no luck, I used telnet no luck. But the strange things when I create .txt file like below From: myname@mydomain.com To: someone@somedomain.com Subject: testing This is the test message body. and drop this text file in X:\Program Files\Exchsrvr\Mailroot\vsi 1\PickUp , it works. Could you please give me any idea why I can't used when I use outlook or telnet . Thanks

hi, How about message tracking log say? Message tracking log:http://www.msexchange.org/tutorials/Exchange-2003-Message-Tracking-Logging.html Since you have test telnet, what's the result? Please post. hope can help you thanks,CastinLu TechNet Community Support