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The error I get in my maillog is usually: 'Sender address rejected: Domain not found'
I suspect that the FQDN i use in my HELO is incorrect, however when I do a telnet localhost 25 and execute a HELO I get my FQDN, so it seems correct.
I have tried emailing email@example.com (see [cbl.abuseat.org...] and got the following response.
Notice that it is trying to verify my hostname which does not have a DNS record. Instead it should have verified my domainname.
However I don't understand how it got my hostname. The HELO uses my domainname (as far as I can tell).
I've got a PTR (Reverse DNS lookup) record which points to my domainname and 2 mx records.
From MAILER-DAEMON@mydomain.co.uk Tue May 19 11:29:21 2009
Date: Tue, 19 May 2009 11:29:20 +0100
From: Mail Delivery Subsystem <MAILER-DAEMON@mydomain.co.uk>
Content-Type: multipart/report; report-type=delivery-status;
Subject: Returned mail: see transcript for details
Auto-Submitted: auto-generated (failure)
This is a MIME-encapsulated message
The original message was received at Tue, 19 May 2009 11:29:07 +0100
from localhost.localdomain [127.0.0.1]
----- The following addresses had permanent fatal errors -----
(reason: 550-Verification failed for <apache@myhostname>)
----- Transcript of session follows -----
... while talking to mail-in.cbl.abuseat.org.:
<<< 550-Verification failed for <apache@myhostname>
<<< 550-Unrouteable address
<<< 550 Sender verify failed
550 5.1.1 <firstname.lastname@example.org>... User unknown
<<< 503-All RCPT commands were rejected with this error:
<<< 503-Sender verify failed
<<< 503 Valid RCPT command must precede DATA
Reporting-MTA: dns; mydomain.co.uk
Received-From-MTA: DNS; localhost.localdomain
Arrival-Date: Tue, 19 May 2009 11:29:07 +0100
Final-Recipient: RFC822; email@example.com
Remote-MTA: DNS; mail-in.cbl.abuseat.org
Diagnostic-Code: SMTP; 550-Verification failed for <apache@myhostname>
Last-Attempt-Date: Tue, 19 May 2009 11:29:20 +0100
Received: from myhostname (localhost.localdomain [127.0.0.1])
by mydomain.co.uk (8.13.8/8.13.8) with ESMTP id n4JAT7cd007778
for <firstname.lastname@example.org>; Tue, 19 May 2009 11:29:07 +0100
Received: (from apache@localhost)
by myhostname (8.13.8/8.13.8/Submit) id n4JAT7Q1007776;
Tue, 19 May 2009 11:29:07 +0100
Date: Tue, 19 May 2009 11:29:07 +0100
Subject: Welcome to mydomain.co.uk
the email content here
Any help is appreciated. Thank you in advance.