Here is a quick survey of how some of the larger email domains set up their
MX records. Assuming they would want to set up their *mailout* records in
a similar fashion, ...
That's a poor assumption. As I think we've mentioned several times
recently, CSV records are designed to identify client hosts, not
domains, and a normal setup would be to have a CSV record per mail
client.
I realize that all of hotmail's servers lie and say "HELO hotmail.com"
but I don't think it's a good idea to design around one bogus point,
even if it's a large one.
R's,
John
--
Regards,
John R. Levine, IECC, POB 727, Trumansburg NY 14886 +1 607 330 5711
johnl(_at_)iecc(_dot_)com, Mayor, http://johnlevine.com,
Member, Provisional board, Coalition Against Unsolicited Commercial E-mail