On Tue, 20 Nov 2001, Jonnie wrote:
>
> >The SMTP client "MUST" send the canonical hostname for its source
> >address, or a literal representation of that address.
>
>
> Blimey, where does it say that?
> :-)
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.
and in section 4.1.4:
The SMTP client MUST, if possible, ensure that the domain parameter
to the EHLO command is a valid principal host name (not a CNAME or MX
name) for its host. If this is not possible (e.g., when the client's
address is dynamically assigned and the client does not have an
obvious name), an address literal SHOULD be substituted for the
domain name and supplemental information provided that will assist in
identifying the client.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
