Preferred method of advertizing a dual-stack mx server

[Patrice Fournier]

Quoting Jun-ichiro itojun Hagino <itojun@iijlab.net>:

> >I currently have my mail server set to accept mail from either an
> > IPv4 address or an IPv6 one (a 2002::/16 address at the moment).
> > and added an AAAA record to the host that is the MX record. Now,
> > with that change, I've had a report of at least two users who
> > couldn't mail us (nobody at their domains could).
> 
> 	just to make sure:
> 	are the "two users" dual-stacked, or IPv4 only?  if dual-stacked,
> 	is IPv6 connectivity between you and "two users" okay?

AFAIK, they are both IPv4 only... which is what I find the strangest in 
this. 

-- 
Patrice Fournier
pfournier@loups.net