mouss wrote:
It also confirms that your SMTP banner greeting matches the reverse
DNS.
Who requires this?
The hostname in the banner is usually the same hostname as in
HELO/EHLO, and it's often a good idea to HELO/EHLO with a hostname
that matches RDNS.
You are confused.
How so?
(I was *guessing* though (I missed the tiny explanation on the
page), maybe that's the same as confused to you.)
Many hosts are for inbound mail only. They have banner
but won't helo to outsiders.
If the test was meant for what I *guessed*, it simply wouldn't
apply to those hosts.
and even on hosts that send outbound mail, there is absolutely no
requirement that the banner matches the rDNS of some IP.
According to the RFCs, no. And please not that I said nothing
that inplied the requirement.
What some mail system administrators does is require the hostname
in HELO/EHLO to mach RDNS, and since the banner usually presents
the same hostname as HELO/EHLO, the test can still be useful.
Anyway, the site says "... This determines if your IP and SMTP HELO
matches". This is non sense since HELO is used by the client.
That text (wich I didn't see) lacks some critical information,
yes. It should have said something like this:
"This tries to determine if your IP and SMTP HELO matches. This
check will fail if the server you are testing is not both an
inbound and outbound server or if it does not use the same host
name in it's answering banner as in it's HELO/EHLO."
Regards
/Jonas
--
Jonas Eckerman, FSDB & Fruktträdet
http://whatever.frukt.org/
http://www.fsdb.org/
http://www.frukt.org/
