On Fri, Sep 17, 2004 at 03:11:18PM +0000, Mark wrote:
Hello? Ever heard of HELO? :) Sending with en empty envelope-from, to try
and circumvent SPF, is pointless: checks are done against HELO, in that
case (as if tested against, say, postmaster(_at_)HELO). Consequently, since
there is nothing to prevent, there is nothing to send "non empty" either
(where empty was the case).
That was the reference I didn't find.
Which leads to the problem with
HELO [10.0.0.1]
or
HELO i222-150-67-241.s04.a013.ap.plala.or.jp
which would require all ISPs to add SPF records to all entities and
raises again the problems Barry Shein has addressed.
And: if I am a customer of some.isp and my current revDNS entry for the
IP I am using is
1.0.0.10.rev.dsl.some.isp
should I be allowed to send a bounce on behalf of that address, i.e. use
the name or IP in the HELO string?
\Maex
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