Sort order of MX records while doing nslookup

[Martin Rådbo]

The "stupid" smtp-server is unfortunately impossible to change since it is 
bundled with a fax gateway.

Of course the problem is gone if all or our mail servers is up and running 
but the point with several servers is the failover function and to be sure 
that our primary is our primary I would like the rrset function you talk 
about.

I think we do have the latest bind supporting this, do you have an example 
of how to write the zone-fil?

Regards
Martin Rådbo
Teknologia


"Jeff Reasoner" <jeff.reasoner at mail.hccanet.org> skrev i meddelandet 
news:dui4i2$1ea0$1 at sf1.isc.org...
: Unfortunately, probably not. My guess is that your mail server needs to
: resolve MX records almost exclusively from servers you do not manage.
: Answers to those queries, including the ordering, will be determined by
: the authoritative servers not your client resolver. If that is not true,
: and your servers are actually authoritative for all the domains your
: mail server sends to, then a version of Bind that supports fixed rrset
: ordering could do what you're asking.
:
: However, assuming that all the listed MXes are actually mail servers, it
: shouldn't matter. I don't think there's any reason the mail has to go
: *only* to the MX with the highest preference.
:
: Otherwise, "a very small and stupid smtp server" upgrade may be the only
: fix.
:
: On Mon, 2006-03-06 at 11:39, Martin RÃ¥dbo wrote:
: > If we run the command "dig domainname.com MX" or similar (could be 
nslookup
: > or whatever) the dns server responds with a list of MX-records for that
: > particulary domain name, i.e.
: >
: > dig teknologia.com returns
: > teknologia.com.         14400   IN      MX      20 mail3.latitud.net.
: > teknologia.com.         14400   IN      MX      30 mail4.latitud.net.
: > teknologia.com.         14400   IN      MX      10 mail.latitud.net.
: >
: > The sort order is different each time, is there a way to change this?
: > I am aware that in normal circumstances this is without need because the
: > mail server will automatically pick the row with the lowest weight 
number.
: >
: > But we are in a situation running a very small and stupid smtp server (a
: > part of a fax server program) and it seems to choose the first line on t 
he
: > list instead of the lowest weight numbered row.
: >
: > Is it possible to change the way BIND returns this list or not?
: >
: > Best regards
: > Martin RÃ¥dbo
: > Teknologia
: >
: >
:
: