El 16/01/2014 08:52 a.m., James Day escribió:
Hello Postfix User List,
I'm struggling to work out why postfix is unable to forward
> this message when there is a valid MX record.
It is *not* Postfix problem, but solely DNS problem.
cbhc.uk.com uses 2 DNS servers: NS1.NSNOC.COM and NS2.NSNOC.COM
The problem is that NS2.NSNOC.COM responds to queries about
cbhc.uk.com, while NS1.NSNOC.COM doesn't.
The error states that there is no A record for the domain name
> (which is correct) but I would have thought Postfix should be
> looking for an MX record as well.
Postfix searches for MX records 1st, then for A. But apparently
NS1.NSNOC.COM (bad luck!) was queried. and NS1.NSNOC.COM said that
there's not MX record, well, then Postfix tried to find A record,
as should, but A record doesn't exist too... (as thinks NS1.NSNOC.COM).
Advise cbhc.uk.com to fix their DNS, NS1.NSNOC.COM and
NS2.NSNOC.COM *must* have the same data. Or you'll see
random troubles: sometimes mail works, sometimes doesn't, depends
on which of 2 DNS servers was queried. And remember about cached
and reused DNS data...
Regards.
