Re: Three solutions for spam

[Russ Allbery]

Russell Nelson <[EMAIL PROTECTED]> writes:

> Nobody would look up the the MX record to send mail.  It would only be
> used for the anti-spam step #3 I laid out earlier: Get the host's name
> from a PTR record, and look up an MX record for it.

You're overloading a protocol and using it to provide information that was
never part of the protocol definition.  That seems unwise to me.  Now,
unless you add all of those weird hosts to rcpthosts, people get unhelpful
configuration error bounces rather than straightforward bounces if they
send mail to one of those addresses (and people *will* try, believe me).

-- 
Russ Allbery ([EMAIL PROTECTED])         <URL:http://www.eyrie.org/~eagle/>