"We do not relay" NDR, happens sporatically (1 in 20?) and only for replies
Posted on 2004-09-27
This is my first time setting up an Exchange server (2003 SP1) to receive POP3 email, so please bear with me... the problem is that while replying some of the messages are returned with a System Administrator message stating:
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<xxxx.org #5.7.1 smtp;550 5.7.1 <email@example.com>... we do not relay <firstname.lastname@example.org>>
Yet, sometimes the messages to "email@example.com" will go through just fine. I cannot predictably replicate the problem. The users are sending all email via Outlook 2003.
Here is the setup:
- The server's OS is Windows Small Business Server 2003 Standard Edition.
- All 3 client computers are set up to send and receive email from their website/email host (halfpricehosting.com). All of their profile info (email, calendar, tasks, etc) is being stored in their Exchange mailbox. Most of the time everything functions normally, except as noted above. All computers are using Outlook 2003 and are located on the same domain as the Exchange server, thus they should be able to relay via authenication(?).
- When sending email via Outlook Web Access they always receive the "we do not relay" NDR... Otherwise, OWA correctly displays their mailbox/profile info.
- POP3 connector is configured and seems to be working correctly.
- In the default recipient policy "@xxxx.org" is selected as the primary address.
- Ports 110 and 25 are forwarding to Exchange server IP.
Please let me know if you need more info! Thanks!
-Shamus J Daily