Re: All of uu.net about to be banned.

[Raul Miller <rdm@test.legislate.com>]

Alexander Koch <efraim@argh.org> wrote:
> Exim first takes a look at *all* MX records of all the recipients
> and then groups all RCPTs in a single smtp session, thus usually
> decreasing the number of smtp connects quite a lot.

This usually makes error recovery quite a bit more complex, and sometimes
results in duplicate deliveries.  In some circumstances (tenuous tcp
conditions), bundling up smtp sessions takes extra time and delivery
less reliable.  Furthermore, this doesn't really gain anything unless the
bundled-up smtp sessions are across a saturated (or slow) line.  In most
circumstances, qmail's algorithm is a very reasonable design trade-off.

The places where qmail's design is bad are places where you also wouldn't
want to run a web browser.

-- 
Raul