🚀 go-pugleaf

It's been a bit quiet of late in here, but I'm hoping that 
Malcolm Muir and/or Richard Clayton might still be monitoring the 
group, out of curiosity if nothing else.

GremNOS, and to a lesser extent Demon's ka9q/net, have provided 
minimal ESMTP support for years.  Recently I have decided to 
enlarge that support (in GremNOS) for the ESMTP SIZE extension 
(rfc 1870) but find that I cannot make use of it as Demon's punts 
do not (apparently) support ESMTP for delivery; at least they do 
not advertise it with an opening EHLO.

 Sat Apr 11 08:47:54 2009 helo: "helo lon1-punt3-8.mail.demon.net"

is an example of how they announce themselves.  Inspection of the 
Received: headers seems to show that ESMTP is used as the mail 
passes through Demon's MTAs, except for the final hop from the 
punts to the user's SMTP server.  Can this be changed?

I've tried to "coax" the punts by advertising "ESMTP ready" in my 
sign on banner, but that makes no difference :(  RFC 2821 
specifically forbids using any ESMTP server extensions unless the 
client uses EHLO, so unless this can be changed I'm stuffed.

Are the punts truly incapable, or is this a config setting?

Pete

PS. One additional thing I've noticed is that if I reject mail 
with a "552 Message exceeds fixed maximum message size" after the 
DATA command, this message is not apparently relayed back to the 
sender in the DSN.  Are the punts anaware of a 552 error?

-- 
   "We have not inherited the earth from our ancestors,
    we have borrowed it from our descendants."