email being bounced, but can't figure out why

[keat63]

I have a customer who's receiving a bounce from my server, but I can't figure out why.
We receive hundreds of emails per day.

Diagnostic information for administrators:
Generating server: xxxxxxxx.eu.corp.le
[email protected]
mydomain.com
Remote Server returned '<mydomain.com #4.4.1>'
Original message headers:
Return-Path: <[email protected]>
Received: from pps.filterd (xxxxxxxx.eu.corp.le [127.0.0.1])
        by leeupfp006.eu.corp.le (8.16.0.20/8.16.0.20) with SMTP id v2T7EVMK018397
        for <[email protected]>; Wed, 29 Mar 2017 09:22:49 +0200
Received: from xxxxxxxx.eu.corp.le (xxxxxxxx.eu.corp.le [172.25.xx.xx])
        by xxxxx.eu.corp.le with ESMTP id 29dfakjq7m-1
        (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT)
        for <[email protected]>; Wed, 29 Mar 2017 09:22:49 +0200
Received: from xxxxxxxx.eu.corp.le (172.25.16.36) by xxxxxxxx.eu.corp.le
 (172.25.16.36) with Microsoft SMTP Server (TLS) id 15.0.1178.4; Wed, 29 Mar
 2017 09:22:46 +0200
Received: from xxxxxxxx.eu.corp.le ([fe80::895d:f927:afd3:b42e]) by
 xxxxxxxx.eu.corp.le ([fe80::895d:f927:afd3:b42e%12]) with mapi id
 15.00.1178.000; Wed, 29 Mar 2017 09:22:46 +0200
From: "Quest, Sarah" <[email protected]>
To: "[email protected]" <[email protected]>
CC: "Derrick, Lee L." <[email protected]>
Subject: PO 8873996
Thread-Topic: PO 8873996
Thread-Index: AdKoXTPEZP/r7Z5aTVuqPqp0idAvDw==
Date: Wed, 29 Mar 2017 07:22:46 +0000
Message-ID: <[email protected]>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: [xx.xxx.30.7]
Content-Type: multipart/mixed;
        boundary="_002_70e2114e8ce148c0b157da820ee9ca35xxxxxxxxeucorple_"
MIME-Version: 1.0
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-03-29_06:,,
 signatures=0

could anyone help ?

 

[cPanelMichael]

Hello,

Could you let us know the specific bounce message the sender receives, and the corresponding entry in /var/log/exim_rejectlog for the bounced message?

Thank you.

 

[keat63]

In an attempt to try and resolve this quickly, I emptied my firewall block rules, and now the customer can email me.
Although I couldn't find thier IP in the block list, so maybe that was just coincidence.
We've had a number of these just lately, I've no idea whats going on.

 

[cPanelMichael]

In an attempt to try and resolve this quickly, I emptied my firewall block rules, and now the customer can email me.
Although I couldn't find thier IP in the block list, so maybe that was just coincidence.
We've had a number of these just lately, I've no idea whats going on.

Hello,

Is this the same server that's referenced on your previous thread? If so, you may want to test and see if the issue is isolated to those firewall rules.

Thank you.