Facing Issue SMTP Error from remote mail server after RCPT to..

Operating System & Version
Centos
cPanel & WHM Version
latest

howardfmcw

Active Member
Dec 26, 2019
30
4
8
UK
cPanel Access Level
Root Administrator
Single client reporting this error from his email account. Email exists, Server IP Blacklist checked Which is Clean and not blacklisted.
its an Cloudlinux with latest WHM.


The exact error message is :


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]
host za-smtp-inbound-2.mimecast.co.za [41.74.197.210]
SMTP error from remote mail server after RCPT TO:<[email protected]>:
550 csi.mimecast.org Poor Reputation Sender. - Customer Community [gQ1XzZqBPN-sYDigd1ZJXg.za4]
[email protected]
host za-smtp-inbound-1.mimecast.co.za [41.74.193.214]
SMTP error from remote mail server after RCPT TO:<[email protected]>:
550 csi.mimecast.org Poor Reputation Sender. - Customer Community [-sVMJsigMYijBKbbJzgStg.za43]
Reporting-MTA: dns; whm.xxxxx.com

Action: failed
Final-Recipient: rfc822;[email protected]
Status: 5.0.0
Remote-MTA: dns; za-smtp-inbound-1.mimecast.co.za
Diagnostic-Code: smtp; 550 csi.mimecast.org Poor Reputation Sender. - Customer Community [-sVMJsigMYijBKbbJzgStg.za43]

Action: failed
Final-Recipient: rfc822;[email protected]
Status: 5.0.0
Remote-MTA: dns; za-smtp-inbound-2.mimecast.co.za
Diagnostic-Code: smtp; 550 csi.mimecast.org Poor Reputation Sender. - Customer Community [gQ1XzZqBPN-sYDigd1ZJXg.za4]
 

cPanelLauren

Product Owner
Staff member
Nov 14, 2017
13,296
1,252
313
Houston