Jenny Holmberg <[EMAIL PROTECTED]> wrote:
> > > As a matter of policy, is it reasonable to reject messages that fail a
> > > reverse DNS lookup on HELO's FQDN/authentication?
> >
> > Very political question. As long as you don't reject envelope senders of
> > <> and <#@[]>, you won't be violating any RFCs.
>
> It would be a violation of RFC 1123, which states:
[...]
> The HELO receiver MAY verify that the HELO parameter really
> corresponds to the IP address of the sender. However, the
> receiver MUST NOT refuse to accept a message, even if the
> sender's HELO command fails verification.
Interesting; I have never agreed with refusing email based on the DNS
of the HELO or envelope sender, but didn't realize that (at least for HELO)
it was actually verboten.
In real life, of course, there are thousands of domains which do this every
day.
Charles
--
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Charles Cazabon <[EMAIL PROTECTED]>
GPL'ed software available at: http://www.qcc.sk.ca/~charlesc/software/
Any opinions expressed are just that -- my opinions.
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