Need help with error message "503 No recipient(s)."

[KathyB]

I am getting error message "503 No recipient(s)." sometimes when sending mail
through Outlook. Sometimes it goes through fine to the same address so it is
not the address. I need help to correct this problem.

 

[Tom - safercomputing.com]

I am getting error message "503 No recipient(s)." sometimes when sending mail
through Outlook. Sometimes it goes through fine to the same address so it is
not the address. I need help to correct this problem.

Check out this thread;
http://forums.hostmatters.com/showthread.php?s=1f892e48338c6ca4a4340a07739da7ba&p=59853#post59853