I have a exchange server with a pop 3 connector in a sbs 2003 enviroment.So I have one user created on both pop3 and exchange server with different e-mail accounts eg For user ted I have firstname.lastname@example.org that is on both exchange and pop3 and then I have another e-mail address for ted which is email@example.com.The firstname.lastname@example.org address resides on the pop3 server,when I send a e-mail to the pop3 account(email@example.com) from my exchange server side I receive the following error.
Your message did not reach some or all of the intended recipients.
Sent: 7/25/2007 5:19 PM
The following recipient(s) could not be reached:
Teddy on 7/25/2007 5:17 PM
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
<exchange.com #5.5.0 smtp;550 <IMCEAex-_O=Exchange_OU=FIRST+20ADMINISTRATIVE+20GROUP_CN=RECIPIENTS_CNfirstname.lastname@example.org>: Recipient address rejected: User unknown in virtual mailbox table>
And if I send an e-mail to the pop 3 account from my gmail account he receives the mail.
P.S Everything was working fine I and nothing changed.