"More better" approach?

[Tuc at T-B-O-H.NET]

Hi,

	I'm wondering if there is something that specifies the "preferred"
way of using IPv6 when it comes to MX records.

	Currently, my personal domains has the following MX:

	0 - personalmachine-v6 (IPv6 address ONLY)
	10- personalmachine (IPv4 address ONLY)
	15- MX relay (Which many people now claim isn't required, but IPv4)

	I've caught flack before from mailing lists and others that having
my 0 level MX as IPv6 only "Just isn't right".  Some online "DNS Reporting"
services or other start to claim I can't be contacted, etc.

	Is there a "Best Practice" or "In MA's opinion" about this? I'm
looking to bring up our major mail server with an IPv6 address, and I
didn't know if continuing to make it the lowest MX is the best idea, or
just making the record contain a v4+v6 address. I'm not exactly sure what
my original reasoning was, or if its valid anymore.

			Thanks, Tuc