Mail not routing to Mailserver even though MX records poiint there?

[Kevin Darcy]

Well, the MX target for itsupplies.net is mail.itsupplies.net, address
62.190.240.154, and I can connect to port 25 on that address just fine. If no
mail is getting through, I'd surmise that it's a problem with your mail server,
not with DNS or basic network connectivity...


- Kevin


john wrote:

> Kevin,
>
> Thanks for the quick reply.
>
> I was t'neting to everything under itsupplies.net to test the DNS and what
> ports were listening.....
>
> I'm running behind an ASUS router on ADSL.  I've not setup any 'filtering'
> or can see any for SMTP traffic.. I thought that maybe my ISP (PIPEX) has
> some kind of block on my static ip addr. A traceroute for
> mail.itsupplies.net returns the correct IP addr..
>
> I'm just a bit baffled on how to track this down...
>
> John
> "Kevin Darcy" <kcd at daimlerchrysler.com> wrote in message
> news:a4uoki$5v6 at pub3.rc.vix.com...
> >
> > john wrote:
> >
> > > Hello,
> > >
> > > I own itsupplies.net held uk2.net, and I've recently setup a mail server
> at
> > > home on my Unix server (exim). I've changed the MX record on the my
> domain
> > > to point to my server, but no mail is getting through.
> > >
> > > I've tried telnet'ing to port 25 on my ip addr (62.190.240.154), but
> can't
> > > get throught from the 'outside'. (works from inside!). I know the mail
> > > server works as I can send mail from it to anywhere, and can send mail
> to it
> > > from inside my network no probs.
> >
> > Well, is the mail server behind a firewall, a filtering router, an
> Intrusion
> > Detection device? The only real test of whether a mail server is
> accessible
> > from the outside world is to connect to it from the outside world. The
> other
> > tests -- outbound, connect from internal -- don't necessarily mean
> anything.
> >
> > > When I telnet port 25 to itsupplies.net, it comes up with a sendmail
> banner,
> > > not exims, so this is obv. still going to UK2's mail serverr . Is this
> > > 'confusing' my MX record?.. Have I set it up correct.
> >
> > Why are you telnet'ing to itsupplies.net? The MX records for
> itsupplies.net
> > point to mail.itsupplies.net (*both* of the MX records point to the same
> place,
> > by the way, which is kind of pointless). If you want to test basic network
> > connectivity to your mail server from the outside, telnet to port 25 on
> > mail.itsupplies.net. The name "itsupplies.net" probably resolves to a
> webserver
> > of some sort -- the fact that sendmail happens to be listening on the SMTP
> port
> > on that box is probably just a (not so) happy coincidence. Lord only knows
> > what's happening to the mail you send to that mailserver instance -- ask
> > whomever runs the "itsupplies.net" box.
> >
> > Nothing here seems to indicate a DNS problem. It looks more like a basic
> > network connectivity problem.
> >
> >
> > - Kevin
> >
> >
> >