You could try carrying out the lookup through sendmail itself as follows:
# sendmail -bt
...
> /mx servername
You should see:
getmxrr(servername) returns 1 value(s)
mx.blah.blah
If you don't get a response, it is failing to resolve. The problem may lie
in the order Sendmail is looking things up - governed by ResolverOptions and
ServiceSwitchFile...
Tim
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Rob Secrist
> Sent: 28 February 2002 19:49
> To: [EMAIL PROTECTED]
> Subject: Re: Mail issue
>
>
>
> Anyone have any ideas on this? I'm stuck =(
>
> Thanks,
> Rob
>
> On Wed, 2002-02-27 at 16:58, Rob Secrist wrote:
> > It seems that I'm having a mail problem when trying to send mail from a
> > user on one virtual server to a user on a different virtual server. The
> > exact error that pops up in the maillog is:
> >
> >
> > Feb 27 17:15:04 senderdomain sendmail[27401]: RAA27399:
> > to=<[EMAIL PROTECTED]>, ctladdr=<[EMAIL PROTECTED]>
> > (1100/1100), delay=00:00:01, xdelay=00:00:00, mailer=esmtp,
> > relay=recipientdomain.com. [xxx.xxx.xx.xxx], stat=Deferred: 451 4.1.8
> > Domain of sender address [EMAIL PROTECTED] does not resolve
> >
> > If I do an nslookup from either virtual server to the other, information
> > is returned almost instantaneously. I can also do a dig mx domain.com
> > from either to resolve the mx's for each domain.
> >
> > In looking at the sendmail.cf files, it looks like the
> > feature(`accept_unresolvable_domains') was added in the .mc! I'm very
> > confused at the moment.. I have no idea how long this issue has been in
> > effect so don't know of anything that could have been done to make it
> > happen.
> >
> > This is using a cd-rom installation of 1.4.10
> >
> > One thing about our current setup. The hosting server / virtuals are
> > inside a firewall. DNS is outside the firewall so could that be the
> > issue? ie: inside the virtual server that is sending mail is
> > 172.16.0.156 while the public address is xxx.xxx.xx.156 and is going
> > through ipf / ipnat on a bsd firewall. The recipient server is
> > 172.16.0.165 while public is xxx.xxx.xx.165... If this is indeed the
> > problem, what might I do to resolve it?
> >
> > Upon considering that to be the issue, I added 172.16.0.156
> > senderdomain.com to the recipientdomain.com's hosts file to no avail...
> >
> > *at a loss*
> >
> > HELP!
> >
> > Thanks
> > ^_^
> > Rob
> >
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