Re: Getting open smtp servers fixed
- Date: Mon, 14 Sep 1998 11:01:16 +0100
Esa Laitinen said:
> Let me see: 2kB e-mail would take about 1 second with 28.8 kbps line,
> about 2 second for session setup (this would be extremely fast). It'd
> take him 3 seconds per message. 20 messages/minute, 1200/hour.
No, 60 messages/minute or more. You run multiple processes/threads so that
the time taken to do a setup is interleaved with the transmission of other
copies. I would probably have 2 or 3 threads transmitting data at a time,
and maintain a queue of perhaps 10 setup connections, creating more as
entries move to the transmission phase.
Also I would do MX resolution ahead of time and group together addressees
with the same MX - these can be sent one copy between them.
> With open relay, relay having no protections whatsoever (don't know if
> this would work, but an idea anyway): 2kB message 1 second, 2 seconds for
> session setup, 20 chars/address -> 24kB for 1200 addresses (don't know if
> servers accept this much),
Sticking to a limit of 100 is safer. And again you multi-thread the
Clive D.W. Feather | Email: clive@localhost | Tel: +44 1733 705000
Regulation Officer | Home: clive@localhost | or: +44 973 377646
London Internet Exchange | | Fax: +44 1733 353929