Mailnull 47 12 Bounce email problem...


Dec 7, 2013
cPanel Access Level
Root Administrator

I have read many threads, tried them but could not find a solution for bounce emails on my mail queu of the server.

This is header of one of the bouncing email:
mailnull 47 12
1386464987 0
-ident mailnull
-received_protocol local
-body_linecount 310
-max_received_linelength 97
-frozen 1386464988
[email protected]

164P Received: from mailnull by with local (Exim 4.82)
	id 1VpSsV-0003w1-JS
	for [email protected]; Sun, 08 Dec 2013 03:09:47 +0200
042  X-Failed-Recipients: [email protected]
029  Auto-Submitted: auto-replied
072F From: Mail Delivery System <[email protected]>
030T To: [email protected]
059  Subject: Mail delivery failed: returning message to sender
061I Message-Id: <[email protected]>
038  Date: Sun, 08 Dec 2013 03:09:47 +0200
This is the data spool file:
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [email protected]
    The mail server detected your message as spam and has prevented delivery (150).

------ This is a copy of the message, including all the headers. ------

Return-path: <[email protected]>
Received: from [] (port=49146
	by with esmtp (Exim 4.82)
	(envelope-from <[email protected]>)
	id 1VpSsR-0003vo-B0
	for [email protected]; Sun, 08 Dec 2013 03:09:47 +0200
Date: Sat, 07 Dec 2013 22:09:39 -0300
From: "USViaggra" <[email protected]>
To: "mpeyam" <[email protected]>
Message-ID: <[email protected]>
Subject: 24 hours only! 70% OFF
X-Mailer: Airmail (211)
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="6bbb125c_9d397955_210f"
X-Spam-Subject: ***SPAM*** 24 hours only! 70% OFF
X-Spam-Status: Yes, score=27.6
X-Spam-Score: 276
X-Spam-Bar: +++++++++++++++++++++++++++
X-Spam-Report: Spam detection software, running on the system "", has
 identified this incoming email as possible spam.  The original message
 has been attached to this so you can view it (if it isn't spam) or label
 similar future email.  If you have any questions, see
 root\@localhost for details.
 Content preview:  [REMOVED]
It is not possible to stop bouncing emails as they are increasing in the queue.

How can I solve this problem, please help.
Last edited by a moderator:


Staff member
Apr 11, 2011
Hello :)

The messages are bounced because of the SPAM content. Here is the relevant bounce message from the remote server:

The mail server detected your message as spam and has prevented delivery (150)
This seems like an accurate message based on the message content you provided. You should determine the source of the SPAM and implement methods of reducing the amount of SPAM coming from your system. There is a guide on this at:

cPanel - Prevent Email Abuse

Thank you.


Well-Known Member
Sep 14, 2004
inside a catfish
cPanel Access Level
Root Administrator
With all due respect, there is a better method of handling mail that triggers a specific spam threshold. You should never be bouncing spam.

In Exim Configuration Manager:

ACL Options: SpamAssassin™ reject spam score threshold [?] - set this to 15
- it looks like you currently have this DISabled

Filters: SpamAssassin™: bounce spam score threshold [?] -- choose "no bouncing by spam score"
- it looks like you currently have this ENabled with a score of 15

The Filters bounce, the ACLs reject during SMTP. Rejecting during SMTP is always better than accepting/bouncing.

Basically, if you set up the 'bouncing', then you will accept the mail and then attempt to bounce it back to the [usually] forged sender. If you reject [during SMTP], then you won't be bouncing spam back to people who never sent it and you won't have the mail queue building up with so many undeliverable emails.

You might also want to consider setting that value lower (10). Then again, I'm in the US. Depending upon where you are, you may actually receive a number of legitimate emails with a spam score of 10-15.