[Mimedefang] $helo versus $ip

[David F. Skoll]

On Tue, 3 Feb 2004, Jack Olszewski wrote:

> In the archives of this list I can't find anything on possible checks
> of $helo versus $ip in filter_relay. What about finding the address of
> the host given as $helo, and matching it against $ip?  Would it be safe
> to reject the message if they do not match?

No.  It's safe to reject an outsider who claims to be your domain (if
you know for *sure* that it isn't), or who claims to have your IP
address, but anything else can yield false positives.

Regards,

David.