> > That sounds like RFC1123 5.2.5, that says that the mail server may verify
> > that the HELO/EHLO text matches the reverse DNS entry for the mailserver,
> > but that the mailserver must accept the message even if there is not a
> > match.
>
>Does this mean that if reverse dns is mail.mydomaine.com and the server
>identify himself as mydomain.com, i may one day run into trouble ?
Technically, it's possible, but it is not likely.
The reason is that with virtual domains, a mail server can correctly claim
to be any of the domains that it hosts. However, you normally should only
have one reverse DNS entry for an IP. Therefore, it's common for
mailservers to respond with a host name other than the reverse DNS entry.
-Scott
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