On Thu, Nov 29, 2001, Marc MERLIN wrote:
> Well, being a heavy user of SMTP callback, I can tell you the
> problems/features needed:
> - caching of positive callbacks (by far #1)
> (I do not really want caching of negative results, as I'd rather have
> people who just fixed their mail server be able to send right away)
You can have this via a mechanism like dsn.rfc-ignorant.org,
i.e., DNS.
Add to the list:
Not performing a callback twice to the same MX record like
sourceforge.net does. That is:
MAIL FROM:<x@???>
...
DATA
...
From: <x@domain>
with
domain. MX 10 host.domain.
host.domain. MX 10 host.domain.
causes 2 SMTP connections from sourceforge (unless I misunderstood
your explanation why your MTA connects twice to my system when I
send an e-mail; in once case it connected 6 times... probably
due to some forwarding?)
