mail malady - dns/postfix

Jerod Prothe jprothe at
Wed Aug 31 15:49:21 GMT 2005

Greg Barniskis wrote:
> Jerod Prothe wrote:
>> Greetings all,
>> On my network, we used to have some NT box acting as the mail 
>> exchanger and a faulty dns for our domain.  That box has nearly 
>> crumbled.  It's still active, but no longer accepting mail.  I set up 
>> a computer (called galley) with 5.4 and it is (supposedly) running 
>> authoritative dns for our domain, and is handling mail via postfix.  
>> Since I changed the dns, I alerted our registrar, which was originally 
>> doing lookups for us.
>> The problem is, now local citizens are trying to send mail to us, but 
>> they are getting bounce messages reporting that it couldn't talk to 
>> otto, the old NT box.
> [config snipped]
>> There may be more at stake here:  If this doesn't work well, then any 
>> credibility that I have with my employer concerning using open-source 
>> may be exhausted.  Any other conf's I should show?
> At a glance (not thorough inspection) your config looked OK. Expire time 
> of 100 days seems a bit long.
> When I nslookup MX for your domain, I get the addr of your new server 
> "galley", so no apparent problem there (although I see from a follow-up 
> post that some folks are getting MX = otto, and *that* is your problem 
> in a nutshell).
> If otto is no longer providing any services to the outside world, how 
> about just indicating via DNS that otto is CNAME to galley?

CNAME to galley?  That's a good idea.  I changed it and reduced the expire time 
to 10d (I got it out of the Lehey Complete FreeBSD book).  I wonder why it is 
that Australia has updated but a US State has not?

Thanks for your help.

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