Re: "ESMTP" in banner?

On Wed, 16 Apr 1997, Philip Hazel wrote:

> On Tue, 15 Apr 1997, Tom Samplonius wrote:
>
> > Shouldn't the string "ESMTP" appear by default in the SMTP greeting
> > banner? Some mailers won't try EHLO unless they see ESMTP somewhere in
> > the banner. While Exim doesn't support a lot of the ESMTP extensions, it
> > does support SIZE which is very useful.
>
> Is this documented anywhere? First I've heard of it. Looking at the

It is documented in the Sendmail Operaters Guide :) This seems to be a
"best accepted practice" among several mailers. Sendmail can be
configured to look for "ESMTP" (I think this is still the default), or to
try ehlo all the time. So can Zmailer, but by default it tries ehlo all
the time.

Basically, there are a bunch of mailers out there, that are overly
cautious about trying ehlo.

Tom