From: Arnt Gulbrandsen (no email)
Date: Mon Oct 03 2005 - 08:15:43 EDT
Jim Wright writes:
> On Oct 3, 2005, at 5:07 AM, Mariano Cunietti wrote:
>
>> There's no point that states an SMTP client should mandatorily give
>> an FQDN. Can anybody address me to any resource I can eventually
>> look at?
>
> RFC 2821, section 3.6:
>
> http://asg.web.cmu.edu/rfc/rfc2821.html#sec-3.6
>
> Only resolvable, fully-qualified domain names are permitted in SMTP.
One minor nit: The subject of this thread talks about host names, while
2821 section 3.6 talks about domain names. There is a difference. For
example, «iana.org» has sensible MX records, so it is a fully
resolvable domain name as required by 2821 3.6, but it has no A/AAAA
records, so it's not a host name.
Arnt
|
|
|