My wife is going to kill me! I run a home server, W2003 with Ex2003 sp2. Everything has worked well for years when suddenly it started giving me delay and NDR reports. I believe what happened was my ISP finally decided to block port 25. I have been using DNSExit as a relay agent. After switching to a non standard port, I can send inside and outside my network. Nothing external is coming in however. I've preformed telnet tests, and can connect to the server at ports 110, 940(smtp) and 143, so I don't think I have a router issue. Internal mail moves freely, and OL test settings passes. All internal accounts are affected. Network tools shows the following results for MX: mx:burtxxxx.net pref host ip ttl 10 server2003.burtxxx.net x.x.x.x 8hrs (ip is correct for the public side of my router) Error msg received from tests This is an automatically generated Delivery Status Notification THIS IS A WARNING MESSAGE ONLY. YOU DO NOT NEED TO RESEND YOUR MESSAGE. Delivery to the following recipient has been delayed: matt@burtxxx.net Message will be retried for 1 more day(s) Technical details of temporary failure: The recipient server did not accept our requests to connect. Learn more at http://mail.google.com/support/bin/answer.py?answer=7720 [server2003.burtxxxx.net . (10): Connection timed out] I'm at a loss. I've tried POP, IMAP, restart delete/recreate, spent hours searching the web. I'm leaving town in about 14 hours. That's how long I have to get my wife's Email back up. Thanks in advance

Hi According to your NDR, you should check your DNS. Gmail can’t find your exchange address and throw the mail. In brief, external user doesn’t know ip address of your exchange server. Assuming your domain is "owned" by an ISP or hosting company, and that you are using a NAT router, you will need to put the external DNS of your network as an A record for a subdomain into their servers and also create an MX record pointing to that subdomain Can you try to send email to yu@123.123.123.123 (ip of your server) and check the result ?

Hi Do you have anything to update ?

I was unable to solve three issue. Everything pointed to a dos issue but none was apparent. I moved over to a mail host and gave up on the hunt. Thanks

I was unable to solve the issue. Everything pointed to a dns issue but none was apparent. I moved over to a mail host and gave up on the hunt. Thanks