No MX record drops mail

[Kevin Darcy]

nanayabyznis at junglemate.com wrote:

> Danny Mayer <mayer at gis.net> wrote in message news:<adt9e4$853i$1 at isrv4.isc.org>...
>
> > >
> > >Our server is the one that drops mail to domains without an MX record
> >
> > An MX record is NOT required for SMTP to deliver mail provided that the given
> > FQDN has a valid A or AAAA record and is able to receive mail.
> > Your server is misconfigured.  Please read the appropriate mail RFC's.
>
> Which one in particular has relevance to the sendmail.mc ruleset i described below?
>
> > >dnl # define(`_RELAY_MX_SERVED_', 1)dnl
> > >from the mc file, but i still get returned mail
> > >
> > ><<< 450 4.7.1 <wang_wz at gdvnet.com>... Can not check MX records for
> > >recipient host gdvnet.com
> > ><user at gdvnet.com>... Deferred: 450 4.7.1 <user at gdvnet.com>... Can not
> > >check MX records for recipient host gdvnet.com
> > >
> > >if an MX record truly exists for this domain why can't my DNS find it?
> > >  is it my problem or his?
> >
> > An MX record is not required to exist. <snip>
> > you have a misconfigured mail server.
> >
>
> so the problem cannot be solved via DNS?

Well, gdvnet.com *does* have an MX record, so I think you're misdiagnosing the
problem. Either your nameserver can't resolve the MX record (which you can test just
by doing queries from the command line), or perhaps sendmail is not properly
configured to use the nameservice.


- Kevin