[BBLISA] Strange DNS behavior

[Theo Van Dinter]

On Tue, Feb 24, 2004 at 12:15:28PM -0500, Edward Ned Harvey wrote:
> (That is, why does my dns server reply using the mid-priority mx,
> instead of the high-priority mx?)  (It seems to always give the
> second-highest priority mx first, because if I add a 40-priority mx,
> then the 30-priority mx comes up first.)

The server responds with the 3 records in a (usually) random order.
It's up to the MTA to figure out preference.

For instance for me, it changes for pretty much every query:

kluge.net.              86400   IN      MX      10 mail.bblisa.org.
kluge.net.              86400   IN      MX      10 bugzilla.spamassassin.org.
kluge.net.              86400   IN      MX      5 eclectic.kluge.net.

kluge.net.              86400   IN      MX      10 bugzilla.spamassassin.org.
kluge.net.              86400   IN      MX      5 eclectic.kluge.net.
kluge.net.              86400   IN      MX      10 mail.bblisa.org.

kluge.net.              86400   IN      MX      5 eclectic.kluge.net.
kluge.net.              86400   IN      MX      10 mail.bblisa.org.
kluge.net.              86400   IN      MX      10 bugzilla.spamassassin.org.

but MTAs know they should take the 5, then either of the 10s.

-- 
Theo Van Dinter, tvd at bblisa.org/felicity at kluge.net
Systems Administrator, bblisa.org/kluge.net
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