Slightly OT - MX RR Santity Check requested...

Mark Andrews Mark_Andrews at
Thu Mar 29 03:08:41 UTC 2007

> Assume that we block the pref 5 MX host (which we do).  Shouldn't sending 
> hosts use the pref 10 MX RR?

	Most do but they are not *required* to.

	The RFC have parts which are optional to implement.
	Fallback is one such optional part.

> ... Kev
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at

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