Question : Requested action not taken: mailbox unavailable. [SMTP Error Code 550]

Cannot send email to certain addresses, I receive the following error. What could be the problem?


Requested action not taken: mailbox unavailable. [SMTP Error Code 550]

    ---- Contents of the undelivered mail ----

Received: From notes.warnockauto.com ([205.190.245.188]) by gatekeeper1 (WebShield SMTP v4.5 MR2);
             id 1139938646859; Tue, 14 Feb 2006 12:37:26 -0500
To: [email protected]
Subject: Fw: Donny vacation
MIME-Version: 1.0
X-Mailer: Lotus Notes Release 6.5 September 26, 2003
Message-ID: 57115.00609BFC-85257115.0061630B@warnockauto.com>
From: [email protected]
Date: Tue, 14 Feb 2006 12:35:39 -0500
X-MIMETrack: Serialize by Router on Notes/Warnockauto(Release 5.0.9 |November 16, 2001) at
 02/14/2006 12:35:39 PM,
             Serialize complete at 02/14/2006 12:35:39 PM
Content-Type: multipart/alternative; boundary="=_alternative 0061630985257115_="

Answer : Requested action not taken: mailbox unavailable. [SMTP Error Code 550]

The message generated normally means what it says.

"Requested action not taken: mailbox unavailable".

The mailbox that the message is being sent to is unavailable. It would be a problem at the remote server which the remote administrators would need to look at.

Simon.