Dan Frazer wrote:
> Here are stripped examples of 2 domains on the same mail server. This
> creates multiple PTR records per IP.
>
> @ MX 0 mail.microsoft.com.
> mail A 111.111.111.111
>
> @ MX 0 mail.yahoo.com.
> mail A 111.111.111.111
PTR records are separate records that don't have to exist. You could
conceivably have just one PTR record for 111.111.111.111.
> If you did a reverse lookup for the IP of 111.111.111.111 you would
> get both mail.microsoft.com and mail.yahoo.com.
You *could* get more than one, I don't think it's a requirement that
all *have* to be returned. Anyone ambitious enough to research this?
Anyway, AFAIK the check doesn't go deeper than one sub-domain below
the top domain, i.e. foo.school.edu. and bar.school.edu. are both
acceptable as being in the school.edu. domain.
--
[EMAIL PROTECTED] �The avalanche has started, it is too late
Rod Dorman for the pebbles to vote.� � Ambassador Kosh
Please visit http://www.ipswitch.com/support/mailing-lists.html
to be removed from this list.
An Archive of this list is available at:
http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
