Testing SMTP over IPv6

[Peter Tattam]

On Fri, 3 Dec 1999, Matt Crawford wrote:

> > ...  I would hazard a guess
> > though that for at least 75% of cases the guidelines I suggested might apply.
> 
> Yes, or more.
> 
> > Anyone like to comment as to how sendmail will typically react in
> > the suggested scenario?
> 
> Except in pathological cases (DNS answer > 8192 bytes, pinhead admin
> configured "ignore truncation", or more than 100 MX records for
> target) sendmail will try all the mail exchangers it should.  Your
> guidelines would then "win".  Hm, except, does it need to be pointed
> out that
> 
> > > > > > IPv6 only servers		MX    a
> > > > > > IPv6 + IPv4 servers		MX    b
> > > > > > IPv4 only servers		MX    c
> > > > > > 
> > > > > > Where a < b < c
> 
> should be c < b < a if the "final delivery" is made only on v4-only
> hosts?
> 				Matt
> 

Yes... if that is the intention.

Peter

--
Peter R. Tattam                            peter@trumpet.com
Managing Director,    Trumpet Software International Pty Ltd
Hobart, Australia,  Ph. +61-3-6245-0220,  Fax +61-3-62450210