On Thu, Jan 22, 2004 at 01:13:45PM -0500, John A. Martin wrote:
|
| Are you perhaps referring to rfc2821 Section 4.1.4 Paragraph 6:
|
| An SMTP server MAY verify that the domain name parameter in
| the EHLO command actually corresponds to the IP address of the
| client. However, the server MUST NOT refuse to accept a
| message for this reason if the verification fails: the
| information about verification failure is for logging and
| tracing only.
|
| This is IMHO usually read to mean that a server may refuse to accept a
| message for whatever reason except for the reason that the parameter
| in the EHLO command does not correspond to the address of the client.
| I'm sure there are those that argue otherwise but not among the more
| active anti-SPAM practitioners many of whom reject mail for various
| reasons involving the EHLO parameter.
|
I consider this a bug in 2821. I don't know the reasoning that went
into it but I think that text needs to change.
The other thing I would fix is the "implicit MX" rule where a host only
has an A record.
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