Autor: Michael Stevens Data: A: exim-users Assumpte: Re: [Exim] Failing behviour based on SMTP codes.
On Tue, Oct 10, 2000 at 04:44:29PM -0400, Greg A. Woods wrote: > The only exception is perhaps EHLO which might conceivable merit a retry
> with a HELO command, especially if the answer is actually 503, though as
> we've seen in another recent thread even that case can be confusing when
> a mailer has explicitly advertised that it is expecting EHLO.
I may not know the standards fully, but as far as I'm aware you *can't*
advertise that you support EHLO within the published protocols. Some
implementations may happen to put it in the banner, but there's nothing
that says you're allowed to draw any conclusions from this.