Re: "ESMTP" in banner?

> > Basically, there are a bunch of mailers out there, that are overly
> > cautious about trying ehlo.
>
> I could change the default Exim banner if enough people thought it a
> good idea. What do other people think?

Don't change it. The banner should contain "200", the FQDN of the MTA,
and an uninterpreted string (possibly useful for humans trying to debug
problems). Mailers that modify their behaviour according to the presence
or absence of some special text inside the part that is not supposed to be
interpreted, might or might not lose (depending on how carefully they have
been implemented). It's perfectly legal for an SMTP banner to include the
text "ESMTP not spoken here" or "the following statement is false: ESMTP
not spoken here".

--apb (Alan Barrett)