--On Dienstag, Juni 07, 2005 23:48:21 +0200 Frank Ellermann
<nobody(_at_)xyzzy(_dot_)claranet(_dot_)de> wrote:
[...]
No, "well-known host names" like mail, www, ftp, news, etc. at
least _were_ a sound strategy. There's nothing wrong if your
smtpd says "EHLO mail.mehnle.net" and this is only a CNAME.
This is incorrect. The fqdn given as parameter to EHLO must be a
primary host name, not an alias:
RFC 2821, section 3.6
| - The domain name given in the EHLO command MUST BE either a primary
| host name (a domain name that resolves to an A RR) or, if the host
| has no name, an address literal as described in section 4.1.1.1.
Ralf Döblitz