Frederik Lindberg writes:
> Qmail is fastest under well-connected conditions when the recipients
> per host are close to 1 (most "normal traffic"). Still, it would be
> nice to improve it in more marginal situations as well. QMTP to smarthosts
> and other qmail hosts would go a long way, although I would prefer if there
> were a mechanism other than magic number MX records to keep track of who
> can do QMTP.
Why? It's nearly cost-free. The algorithm for remote delivery would
be "get the MX record. If it's in the magic range, attempt to talk
QMTP on the port given in the record. If the connection is refused or
times out, fall back to SMTP.
There are 65536 different MX numbers. It would be quite
straightforward to usurp a range of them. Last time I looked, nearly
everybody uses priorities less than 1000. Pick a range above that,
and query as many hosts as you can to see if anyone uses it. If
nobody you can find does, it's likely that nobody else does. If it
turns out that someone does after QMTP is in use, politely explain the
situation and ask them to change. MX record numbers carry only a few
bits of information.
--
-russ nelson <[EMAIL PROTECTED]> http://russnelson.com
Crynwr sells support for free software | PGPok | Government schools are so
521 Pleasant Valley Rd. | +1 315 268 1925 voice | bad that any rank amateur
Potsdam, NY 13676-3213 | +1 315 268 9201 FAX | can outdo them. Homeschool!
