I got a user (company owner) complaining about some emails not getting delivered to his mailbox.
I made 2 tests - one internal and one external, and both got into his mailbox.
Some hours later he still complained about the same problem. I decided to do the same test and for my surprise the external email was rejected:
Delivery to the following recipient failed permanently:
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 5.7.1 Recipient not authorized, your IP has been found on a block list (state 13).
----- Original message -----
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
Received: by 10.66.87.202 with SMTP id ba10mr91245589pab.72.1356628326928;
Thu, 27 Dec 2012 09:12:06 -0800 (PST)
Received: by 10.66.149.231 with HTTP; Thu, 27 Dec 2012 09:11:51 -0800 (PST)
From: =?ISO-8859-1?Q?Vin=EDcius_Dell=27Aglio?= <email@example.com>
Date: Thu, 27 Dec 2012 14:11:51 -0300
Subject: Teste externo
To: monteiro <firstname.lastname@example.org>
Content-Type: multipart/alternative; boundary=f46d042fddce84cf7804d1d8a5ff
As the error stamp, i guess it was the exchange anti spam, "ip block list provider" . Am I right?
How can I track emails that are been rejected from my Exchange?
Some tips to set a correct anti-spam configuration? I mean, i want a "light" configuration... i prefer that some spam get into my organization than legitime email get rejected.