MX Problem?

[janl at linpro.no]

Andrew Buenaventura <andrew at infinitymalls.com> tastet:
> 
> Everytime I send an email to a domain, I get the following error:
> 
> Domain of sender address user at noc.ph does not resolve.
> 
> What do you think is wrong with my DNS ?

$ host -t mx noc.ph
noc.ph                  MX      5 mail.noc.ph
 !!! noc.ph MX record has zero ttl

Set a nonzero TTL.  Zero TTL records has a tendency to time out before
they are served to the requester.

Nicolai