[ On Friday, May 16, 2003 at 14:04:40 (+0100), Phil Chambers wrote: ]
> Subject: Re: [Exim] I wish HELO had never been thought of!
>
> > So what's the proper exim setup when machines are on a NAT'ed network?
> >
> > This laptop I'm using right now sends out HELO laptop.hank.org which there
> > is no A record for (there is on the NAT side, but that's a different story).
> >
> > I could setup a smarthost, but I use the laptop on different networks.
>
> I think your situation just re-inforces my case. If HELO did not exist the
> receiving site would be forced to use the IP address from which the message arrives
> and not cause confusion by adding your arbitrary HELO information.
It is generally agreed that "Hello" is an appropriate greeting because
if you entered a room and said "Goodbye," it could confuse a lot of
people.
-- Dolph Sharp, "I'm O.K., You're Not So Hot"
The HELO step in the protocol, along with the expected 220 response, is
a very critical part of the protocol. It is what allows a mail server
to immediately identify whether or not it is talking to itself.
These days it is also the step which allows as server to identify with
at least some level of certainty whether or not the client is lying
about its name or not too.
--
Greg A. Woods
+1 416 218-0098; <g.a.woods@???>; <woods@???>
Planix, Inc. <woods@???>; VE3TCP; Secrets of the Weird <woods@???>
