We have an issue sending/replying email to one particular external email address. We can receive email from that email just fine. We have no other known issue sending email to any other addresses. What I have not been able to figure out is that if this is a problem on our side or the other side. Your input is appreciated.
Delivery has failed to these recipients or distribution lists:
An error occurred while trying to deliver this message to the recipient's e-mail address. Microsoft Exchange will not try to redeliver this message for you. Please try resending this message, or provide the following diagnostic text to your system administrator.
The following organization rejected your message: host241.hostmonster.com.
Sent by Microsoft Exchange Server 2007
Diagnostic information for administrators:
Generating server: XXXXX.XXXX.LOCAL
host241.hostmonster.com #550-Verification failed for <XXX@XXXX.com> 550-The mail server could not deliver mail to XXXX@XXXXl.com. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries. 550 Sender verify failed ##
Original message headers:
Received: from XXXX.XXX.LOCAL ([::1]) by XXXX.XXXX.LOCAL ([::1]) with
mapi; Tue, 22 Mar 2011 14:26:12 -0400
From: XXXXX <XXXXX@XXXX.com>
To: "XXXX@XXXX.com" <XXXX@XXXX.com>
Date: Tue, 22 Mar 2011 14:26:11 -0400
Subject: RE: XXXX
Content-Type: text/plain; charset="us-ascii"