Changing mail server name

[tristanlee85]

I recently changed my nameservers, but when I run a diagnostic tool on my mail server, it still shows my old hostname and no mail is being delivered.

I am running FC7 and Postfix. I've look in the main.cf file and I don't see anything and I believe I have change my hostname elsewhere that I could find so I'm not sure what else needs changed.

[topdog]

Are your name servers returning the correct MX record ?

[tristanlee85]

When I do a MX lookup, it's returning the correct hostname, but when I run a test on the server to check for open relays and such, it's returning my old hostname.

Because of this, I believe it's why I am not receiving any e-mail.

[falko]

Any errors in your mail log? What's in /etc/postfix/main.cf? What are the outputs of

hostname

and

hostname -f

?

[tristanlee85]

Well actually I found a line I had skipped over before it /etc/postfix/main.cf that had my old hostname. I changed it and that worked.

Now, I seem to be getting these messages now:

Return-Path: <>
 X-Spam-Checker-Version: SpamAssassin 3.2.1 (2007-05-02) on
        hostname.domain.net
 X-Spam-Level: 
 X-Spam-Status: No, score=-0.0 required=5.0 tests=NO_RELAYS autolearn=ham
        version=3.2.1
 X-Original-To: apache@hostname.domain.net
 Delivered-To: apache@hostname.domain.net
 Received: by hostname.domain.net (Postfix)
        id 923CC10FA04; Fri,  4 Apr 2008 16:33:35 -0400 (EDT)
 Date: Fri,  4 Apr 2008 16:33:35 -0400 (EDT)
 From: MAILER-DAEMON@hostname.domain.net (Mail Delivery System)
 Subject: Undelivered Mail Returned to Sender
 To: apache@hostname.domain.net
 Auto-Submitted: auto-replied
 MIME-Version: 1.0
 Content-Type: multipart/report;
  report-type=delivery-status;
  boundary="C8F5B10FA05.1207341215/hostname.domain.net"
 Content-Transfer-Encoding: 8bit
 Message-Id: <20080404203335.923CC10FA04@hostname.domain.net>
 Status: R
 X-Status: NC
 X-KMail-EncryptionState: 
 X-KMail-SignatureState: 
 X-KMail-MDN-Sent: 
 
This is the mail system at host hostname.domain.net.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<kowwkustoms@netzero.net>: host smtp-server.columbus.rr.com[71.74.56.22] said:
    553 hostname.domain.net does not exist (in reply to MAIL FROM
    command)

Is this happening because of reverse DNS issues?

[topdog]

I think its the actually hostname is it dnsed and does it resolve ?