[CentOS] Mail delivery failing with 450

James Pifer jep at obrien-pifer.com
Sat Mar 7 16:07:00 UTC 2009


On Sat, 2009-03-07 at 14:01 +0100, Joebstl Thomas wrote:
> Hi James,
> 
> MX-records must point to A-records and not to IP adresses.
> A "dig -t AXFR obrien-pifer.com @ns1.obrien-pifer.com | grep MX" returns:
> mail.obrien-pifer.com.  38400   IN      MX      1 
> 70.62.90.185.obrien-pifer.com.
> 
> Whereas you list "mail.obrien-pifer.com.    IN    MX    1 70.62.90.185" 
> in your config.
> 
> So your setup is invalid because:
> - you're pointing your one and only MX record directly to an IP
> - since it is interpreted as host and missing a "." at the end it's 
> expanded to "70.62.90.185.obrien-pifer.com." which doesnt exist
> - it's a MX record for mail.obrien-pifer.com and not obrien-pifer.com
> 
> Your whole definition of the MX record looks goofy to me, dont want to 
> sound like an a.. but you better (re)read some tutorials on setting up DNS.
> I really wonder if you receive the reply at all.
> 
> Regards,
> Thomas


Thomas,

Can you tell me if it looks better now?

Thanks,
James



More information about the CentOS mailing list