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Home » Kerio User Forums » Kerio Connect » Delivery from outside rejected (Disk crash, full restore, but new incoming email rejected)

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I had a disk crash on on a Kerio 7.43 mail server. I needed to replace quick so I chose to install the Kerio Connect Virtual Machine on a VMware workstation. That all appears to have gone just fine.

Then I did a FULL restore of Kerio backup and that completed successfully.

Now when I send email to that site from an outside source such as a gmail account it is all rejected and this error is sent back to sender:

The original message was received at Thu, 4 Apr 2013 16:22:42 -0400
from localhost.localdomain []

----- The following addresses had permanent fatal errors -----
(reason: 550 5.7.1 Relaying to <malcolm<_at_>> denied (authentication required))

----- Transcript of session follows -----
... while talking to
>>> DATA
<<< 550 5.7.1 Relaying to <malcolm<_at_>> denied (authentication required)
550 5.1.1 <malcolm<_at_>>... User unknown
<<< 503 5.5.1 Need RCPT (recipient)

Final-Recipient: RFC822; malcolm<_at_>
Action: failed
Status: 5.7.1
Remote-MTA: DNS;
Diagnostic-Code: SMTP; 550 5.7.1 Relaying to <malcolm<_at_>> denied (authentication required)
Last-Attempt-Date: Thu, 4 Apr 2013 16:22:43 -0400
User malcolm is a legit user on the domain who should receive email.


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I solved this. The problem was that the setting in Kerio admin for "internet host name" did not match the DNS record for that server.

Apparently Kerio rejected incoming and then reported the wrong error message.
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