On Mon, Jan 03, 2011 at 07:44:51PM +0100, Ralf Hildebrandt wrote:
> * Wietse Venema <wie...@porcupine.org>:
>
> > 421-4.4.2 host.example.com Error: timeout exceeded
> > 421 4.4.2 For assistance, contact the helpdesk at 800-555-0101
> >
> > I wonder how many calls you would actually get for that.
>
> Almost none, because users cannot read [bounce messages].
They understand that the message did not arrive:
http://funstoo.blogspot.com/2010/12/what-we-say-to-dogs-what-they-hear.html
This said, in a B2B context, a less experienced postmaster of a
remote domain may in some cases benefit from a link to a more detailed
explanation of an SMTP reject message. A fixed suffix for SMTP error
responses is probably the right cost/benefit trade-off.
--
Viktor.
