: Getting Error 550 "No such user here" when sending mail to my other domain I have two hosting accounts, personaldomain.com and companydomain.com. Both have User level cPanel. Whenever I try to

@Cugini213

Posted in: #Cpanel #Email #Smtp

I have two hosting accounts, personaldomain.com and companydomain.com. Both have User level cPanel. Whenever I try to send email from personaldomain.com to any email address on companydomain.com, I instantly receive a Mail Delivery System message saying:

Subject: **Mail delivery failed: returning message to sender**

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

theiremail@personaldomain.com
No Such User Here


This only happens from personaldomain.com to companydomain.com, and not the other way. I've tried each address, and looking at the headers, it doesn't seem to be leaving my mail server:

Received: from ns1.usm4.siteground.biz ([my-ip-address] helo=mymailserver1.usm4.siteground.biz)
by se8.mailspamprotection.com with esmtps (TLSv1.2:DHE-RSA-AES256-SHA:256)
(Exim 4.85)
(envelope-from <myemail@personaldomain.com>)
id 1aYcMc-0003NN-Qz
for theiremail@companydomain.com; Wed, 24 Feb 2016 10:32:37 -0600
Received: from localhost ([127.0.0.1]:38882 helo=mymailserver.usm4.siteground.biz)
by mymailserver1.usm4.siteground.biz with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256)
(Exim 4.80.1)
(envelope-from <james@duckduckloop.com>)
id 1aYcMc-0007Zf-Lg
for theiremail@companydomain.com; Wed, 24 Feb 2016 11:32:34 -0500
Received: from an-ip-address ([an-ip-address]) by mysubserver.sgcpanel.com
(Horde Framework) with HTTP; Wed, 24 Feb 2016 16:32:34 +0000
Date: Wed, 24 Feb 2016 16:32:34 +0000
[more content headers and filters]
X-SpamExperts-Outgoing-Class: ham
X-SpamExperts-Outgoing-Evidence: Combined (0.29)
X-Recommended-Action: accept


I also noticed that the returned emails have a time of 4:32am when my server is 11:32am EST (sending from Webmail Horde) and my local time is 10:32am (sending from Outlook or iPhone). I don't know if that affects the authentication.

I'm able to send to companydomain.com from any other email address. I'm able to send to any other domain from personaldomain.com.

How can I figure out the source of this error, so I can fix it?

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