Re: rfc2821bis-03 Issue 35: remove source routes from example D.3

Frank Ellermann writes:
> Arnt Gulbrandsen wrote:
> > "foo.com, having received the message, verifies delivery to
> >   jones(_at_)xyz(_dot_)com is permissible and possible. foo.com now does a DNS 
> >   lookup on xyz.com."
> Actually it should verify jones(_at_)xyz at the time when it decides to 
> accept the mail, but at this time xyz is down, and so that's not 
> possible.
I've done that by verifying against old data, ie. the secondary accepts 
mail to addresses that were valid a few days earlier and answers 4xx 
for other addresses. Very easy and solves almost all of the problem, 
with negligible side effects.
> The verification business after it has accepted the mail is pointless, 
> it's too late, foo.com can only pray that xyz.com eats its spam.
Good point.

Arnt