how to obtain MX records for a domain

[Barry Margolin]

In article <daubaj$dqm$1 at sf1.isc.org>, frank at nfurter.spam wrote:

> On Fri, 10 Jun 2005 21:09:07 -0400, Barry Margolin
> <barmar at alum.mit.edu> wrote:
> 
> >> I want to obtain MX records for a domain, just as host.c does it. Is
> >> there a less sophisticated example using dns_resolver functions,
> >> because host.c / dighost.c apparently are not to be used as an
> >> example, and they are more sophisticated than I require. Thanks.
> >
> >I think the chapter on using the resolver library in the DNS & BIND book 
> >has an example of doing precisely this.
> 
> I have looked through every page of the DNS+BIND book, particularly
> the chapter on resolver programming Ch 15, and I cannot find any
> example to obtain MX records for a domain. Ch 15 gives as an example
> getting SOA records or some such, which appears irrelevant.

Sorry, my memory was not that detailed.  I remembered that there was an 
example in the book, I didn't remember specifically what type of record 
it looks for.

> It would be very convenient to have a short example to do this.... can
> you tell me if I am wrong, or if there is an example in some other
> source?

How hard is it to replace SOA with MX in the example?  Also, you'll 
probably want to use a recursive query -- the example in that chapter is 
non-recursive.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***