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Re: [LUG] Mail skipping MX

 

On Tue, 03 Aug 2010 11:30:20 +0100
Simon Williams wrote:

> Morning all.
> 
> I'm having some trouble at a charity I've been helping out 
> (bisc.org.uk). They're using 123-reg for DNS and mail forwarding. The
> MX records are set to 123-reg, then we have a bunch of A records for
> the website with Hostgator.
> 
> In the last couple of weeks, mail has been intermittently bouncing.
> What I don't understand is that the bounce messages are from
> Hostgator. It seems that there is some problem with the MX and so the
> mail servers are falling back to delivering to the A record. Is it
> possible that some mail servers are skipping the MX completely?
> 
> I called 123reg when this first happened and they couldn't see
> anything wrong. It was working again at that point, so I put it down
> to someone making a mistake somewhere. Now the problem is back, but
> it's still random whether it will bounce or deliver.
> 
> To be honest, all things point to a problem with 123reg, but does
> anyone have any other ideas, or know where I can get more information?
> 
> Thanks.
> Simon

Do you have an @=cname entry?

"If you have an @ record set to a CNAME, all other @ records (including
MX) will be ignored and set to the same domain to which it points."

(Warning from 123-Reg DNS management page)

Grant.

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