Mail servers

[Barry Margolin]

In article <blh5iv$b3p$1 at sf1.isc.org>,
Pete Walker <pete.walker at adssolutions.co.uk> wrote:
>I am having problems sending e-mails to one domain in particular.  They all
>bounce back with the following error:
>
>----- The following addresses had permanent fatal errors -----
><xyz at domain.co.uk>
>
>  ----- Transcript of session follows -----
>554 permanent problems with the remote server mail.domain.co.uk
>
>When I contact their technical people I'm told that we are the only co.
>having problems sending to them and it must be our DNS settings at fault.
>
>I check their DNS settings and find that the mailserver doesn't respond
>properly, so I try to ping it (from outside as well) and it doesn't respond.
>
>So, I check mail settings for their domain and find that there are three
>mail servers listed (2 in other domains) and the priority is set highest (5)
>for the one which doesn't respond to a ping or traceroute.  The other two
>servers are set with priorities of 10 and 20 respectively.

What domain are you talking about?  I looked at domain.co.uk, and it only
has two MX records:

domain.co.uk.		86400	IN	MX	20 mxrelay.gradwell.net.
domain.co.uk.		86400	IN	MX	10 mail-in.gradwell.net.

-- 
Barry Margolin, barry.margolin at level3.com
Level(3), Woburn, MA
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