On 12 Nov 2019, at 14:26, Viktor Dukhovni wrote:
On Nov 11, 2019, at 11:09 AM, Bill Cole
<postfixlists-070...@billmail.scconsult.com> wrote:
mail.namase.de is the HELO (EHLO) name. You must not reject mail
when helo
name differs from DNS name (RFC violation).
True.
For the record, it is NOT an RFC violation for the EHLO name to
differ from the name in the PTR record of the connecting IP.
Right and as was stated & I affirmed: it is explicit in RFC5321 S.4.1.4:
An SMTP server MAY verify that the domain name argument in the EHLO
command actually corresponds to the IP address of the client.
However, if the verification fails, the server MUST NOT refuse to
accept a message on that basis.
i.e. using an EHLO name that doesn't match the client IP in DNS isn't a
RFC violation and rejecting because of a mismatch IS a RFC violation.
--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
