difficult problem with DNS and Mail

[Kevin Darcy]

You can call the nameserver anything you want. Just make sure you keep the nameserver
name(s) and address(s) in synch between what you publish from the zone and what your
registrar provides to the TLD servers. Otherwise you're asking for trouble -- you too
could join the ranks of the loathed and despised delegation-botchers :-).

As for "mailhub" (or, more accurately, MAIL_HUB), see the cf/README file in the
sendmail distribution for the basic rundown of how it works and how to configure it.
If you have more complex requirements, you may want to go to something like
mailertables, virtusertable or LDAP-based routing instead. But it sounds like all you
need is a "punt" for inbound mail.


- Kevin

Gary Kline wrote:

> On Fri, Jul 20, 2001 at 07:33:45PM -0400, Kevin Darcy wrote:
> >
> > This is really more of a mail server question than a DNS question. In DNS terms,
> > your mail (MX record) would be pointed to fubar. Then fubar would forward the
> > mail to tao through the firewall. If fubar is also being used for outbound mail,
> > then you'd probably want to go with a "mailhub" type of sendmail configuration,
> > i.e. where all "local" addresses are forwarded to some other box. I'm not really
> > up-to-date on how to do that, since we've had separate servers for inbound and
> > outbound mail for a number of years, and that's a somewhat different
> > configuration...
> >
> >
>
>         Hm...  One thing I'm wondering about is: wwould I have to
>         bother switching my interNIC  registery?   It might be
>         vastly simpler to make *this* (TAO) 249 and FUBAR 248;
>         then FUBAR  could be my new NS1.THOUGHT.ORG as it is
>         currently in Network Services' records.
>
>         Any pointers to the `mailhub' config would be welcome.
>         DNS AND BIND reads like a novel ;  the big blue sendmail
>         tome gives me the shivers :-)/2.