[BlueOnyx:17633] Re: Mail Delivery Subsystem error mesage

[Chris Gebhardt - VIRTBIZ Internet]

On 5/20/2015 8:44 AM, Tom wrote:
> Since rebuilding my server, I've been getting this Mail Delivery Subsystem
> error message several times per day. Is there a simple fix?
> Thanks in advance
> Tom
>
>
> The original message was received at Wed, 20 May 2015 02:01:11 -0400
> from localhost [127.0.0.1]
>     ----- The following addresses had permanent fatal errors -----
> <admin at localhost.localhost>
>      (reason: 550 Host unknown)
>     ----- Transcript of session follows -----
> 550 5.1.2 <admin at localhost.localhost>... Host unknown (Name server:
> localhost.localhost: host not found)
>

Yes, you need a valid hostname configured on your server.   That should fix.

-- 
Chris Gebhardt
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