'scuse my ignorance, but I would have thought that the LHS would be a domain
name as well and so the rules would still apply. I freely admit that I'm not
conversant with the RFCs, so I assume that, while underscore _may_ be valid
for a *host* name it becomes invalid when that host is qualified with the
addition of a _domain_ As I see it, a label on its own is referred to as a
host, but multiple labels delimited by a period are known as a domain.
Paul Walsh
Senior Systems Programmer, Information Services,
University of Central England, BIRMINGHAM B42 2SU
Tel: +44 (0)121-331-5708 Fax: +44 (0)121-356-3875
> -----Original Message-----
> From: Paul Mansfield [SMTP:paulm@???]
> Sent: Wednesday, October 21, 1998 4:00 PM
> To: Exim users mailing list
> Cc: Doug Hall
> Subject: Re: [EXIM] exim mx things and RFCs
>
> On Wed, 21 Oct 1998, David Shaw wrote:
> > On Wed, Oct 21, 1998 at 03:29:57PM +0100, Paul Mansfield wrote:
> > > here's an interesting problem. we have a customer who has a sub-domain
> called,
> > > dc_mailhost.customer.com. 1D IN MX 10 ms1.customer.com.
>
> > Why?
> >
> > Snips from RFC-1035:
>
> ah, but its the left hand side in question, not the exchanger itself, if
> the
> RHS had an underscore, there'd be no doubt...
>
> the problem is that of course noone seems to want to tell the customer
> they're
> wrong :-)
>
> > 3.3.9. MX RDATA format
> >
> > +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
> > | PREFERENCE |
> > +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
> > / EXCHANGE /
> > / /
> > +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
>
> Paul
>
>
> --
> *** Exim information can be found at http://www.exim.org/ ***
--
*** Exim information can be found at
http://www.exim.org/ ***
