Admin emails not coming through

[GwenTheHen]

We have several cPanel servers running, and most seem fine. However, two of them don't seem to be able to send any server emails - for example, confirmation that the daily backups have run correctly. I do however get a bounce report like this:

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]
(generated from [email protected])
host mail.domain.co.uk [79.170.xx.xxx]
SMTP error from remote mail server after RCPT TO:<[email protected]>:
550-Verification failed for <[email protected]>
550-Unrouteable address
550 Sender verify failed



Reporting-MTA: dns; server.example.co.uk

Action: failed
Final-Recipient: rfc822;[email protected]
Status: 5.0.0
Remote-MTA: dns; mail.domain.co.uk
Diagnostic-Code: smtp; 550-Verification failed for <[email protected]>
550-Unrouteable address
550 Sender verify failed



Return-path: <[email protected]>
Received: from root by server.example.co.uk with local (Exim 4.87)
(envelope-from <[email protected]>)
id 1b5iPB-0004Ry-Kc
for [email protected]; Thu, 26 May 2016 00:44:50 +0100
From: [email protected] (Cron Daemon)
To: [email protected]
Subject: Cron <root@server> /usr/local/cpanel/scripts/upcp --cron
Content-Type: text/plain; charset=UTF-8
Auto-Submitted: auto-generated
X-Cron-Env: <LANG=en_GB.UTF-8>
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>
X-Cron-Env: <USER=root>
Message-Id: <[email protected]>
Date: Thu, 26 May 2016 00:40:06 +0100
X-Exim-DSN-Information: Due to administrative limits only headers are returned

Can you help?

 

[cPanelMichael]

Hello,

Are the notifications sent out to a local email address, or is it sent out to an email address hosted on a remote server? If to a remote mail server, do you have root access to that remote mail server?

Thank you.

 

[GwenTheHen]

Hi,

Thanks for the quick response. They are going to a remote server, but we don't have root access to that unfortunately. However, I checked with the host of that server and they couldn't find any trace of the incoming email in the logs.

 

[cPanelMichael]

However, I checked with the host of that server and they couldn't find any trace of the incoming email in the logs.

Hello,

Search for the message ID in /var/log/exim_mainlog to see if it was sent out:

exigrep MSGID /var/log/exim_mainlog

Thank you.

 

[GwenTheHen]

EDIT: Sorry, it did work. Here's the results:

2016-05-26 00:44:50 cwd=/var/spool/exim 4 args: /usr/sbin/exim -odi -Mc 1b5iPB-0004Ry-Kc

2016-05-26 00:44:51 cwd=/var/spool/exim 8 args: /usr/sbin/exim -odi -t -oem -oi -f <> -E1b5iPB-0004Ry-Kc

2016-05-26 00:44:51 1b5iTr-0006Sp-27 <= <> R=1b5iPB-0004Ry-Kc U=mailnull P=local S=2681 T="Mail delivery failed: returning message to sender" for root@server

2016-05-26 00:44:51 1b5iTr-0006Sp-27 [79.170.40.164] SSL verify error: certificate name mismatch: "/OU=Domain Control Validated/CN=*.domain.co.uk"

2016-05-26 00:44:51 1b5iTr-0006Sp-27 => [email protected] <[email protected]> R=dkim_lookuphost T=dkim_remote_smtp H=mail.123.co.uk [79.170.40.164] X=TLSv1.2:DHE-RSA-AES256-SHA:256 CV=no C="250 OK id=1b5iTr-0005Dp-Az"

2016-05-26 00:44:51 1b5iTr-0006Sp-27 Completed

2016-05-26 00:44:50 1b5iPB-0004Ry-Kc <= root@server U=root P=local S=365875 T="Cron <root@server> /usr/local/cpanel/scripts/upcp --cron" for root

2016-05-26 00:44:51 1b5iPB-0004Ry-Kc [79.170.40.164] SSL verify error: certificate name mismatch: "/OU=Domain Control Validated/CN=*.domain.uk"

2016-05-26 00:44:51 1b5iPB-0004Ry-Kc ** [email protected] <root@server> R=lookuphost T=remote_smtp H=mail.domain.co.uk [79.170.40.164] X=TLSv1.2:DHE-RSA-AES256-SHA:256 CV=no: SMTP error from remote mail server after RCPT TO:<[email protected]>: 550-Verification failed for <root@server>\n550-Unrouteable address\n550 Sender verify failed

2016-05-26 00:44:51 1b5iPB-0004Ry-Kc Completed

 

[cPanelMichael]

I suggest sending the notification to a local email address first, and then setting up a filter that forwards or pipes the message to the remote mail server. This should ensure the remote server accepts the message.

Thank you.

 

[GwenTheHen]

Hello,

Thanks for the advice, I have set this up so hopefully tomorrow morning I'll see if it has worked. However, I believe this is a wider issue with the server, as my client doesn't receive emails from the website, and they have to be routed from an external address too. I would like to try to fix the root cause of this problem if possible. Do you have any ideas?

EDIT: I also just realised - the MX records for the domain in question don't point to this server, so I'm not sure if routing to a local email address on the server will work?

 

[cPanelMichael]

EDIT: I also just realised - the MX records for the domain in question don't point to this server, so I'm not sure if routing to a local email address on the server will work?

Check to ensure the domain name is configured with the "Remote Mail Exchanger" option via "WHM >> Edit DNS Zone" if email for the domain name is handled remotely.

Thank you.

 

[GwenTheHen]

OK, I've done that - thanks for the tip. I'll let you know how I get on.

 

[GwenTheHen]

Hello,

I've done this but I'm still not getting any emails through, just the bounce emails. I'm a bit worried that I could miss out on any urgent server notifications. Is there anything else I can try in order to resolve this?

 

[cPanelMichael]

Could you open a support ticket using the link in my signature so we can take a closer look? You can post the ticket number here so we can update this thread with the outcome.

Thank you.