Recently, I setup a new Exchange server 2010 at my organization.
I have setup rDNS and SPF records. Mail goes out to most clients, just some servers are recognizing us as SPAM and rejecting our emails.
A few examples..
server83.secure-access.net rejected your message to the following e-mail addresses:
server83.secure-access.net gave this error:
Spam blocked see: http://www.spamhaus.org/query/bl?ip=188.8.131.52
Your message couldn't be delivered. Try to send it again later. If the problem continues, please contact your helpdesk.
Diagnostic information for administrators:
Generating server: ITVM02.CORP.BEITELLIGENT.COM
server83.secure-access.net #553 5.3.0 Spam blocked see: http://www.spamhaus.org/query/bl?ip=184.108.40.206 ##
Original message headers:
Received: from ITVM02.CORP.BEITELLIGENT.COM ([::1]) by
ITVM02.CORP.BEITELLIGENT.COM ([::1]) with mapi id 14.01.0218.012; Wed, 12 Oct
2011 19:21:54 -0400
From: Peter Barbosa <Peter@beitelligent.com>
To: "Janice Stone (firstname.lastname@example.org)" <email@example.com>
Subject: RE: Invoice
Date: Wed, 12 Oct 2011 23:21:53 +0000
Delivery is delayed to these recipients or groups:
Subject: RE: Questions
This message hasn't been delivered yet. Delivery will continue to be attempted.
The server will keep trying to deliver this message for the next 1 days, 19 hours and 54 minutes. You'll be notified if the message can't be delivered by that time.