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Re: Force independent smtp delivery sessions?
On Fri, Aug 30, 2002 at 02:21:19PM -0600, Daryle A. Tilroe wrote:
> Is there a way (in scheduler.conf?) to force independent delivery
> sessions to a particular domain/mx? I.E. if I have a message going
> to 5 recipients @fu.bar I would like to force the scheduler to deliver
> it with 5 separate sessions to mx.fu.bar with 1 recipient rather than
> 1 session to mx.fu.bar with 5 recipients.
At scheduling level we can not do that. Rewriting parts of routing
might do that, though. -- 10 seconds latter I realized that no, that
can't be done. (channel/host/user/privilege -quad, the 'host'
part must be the user's destination domain. It can't be the full
recipient address, which would take care of parallellizing
each recipient address just fine...)
The "EZMLM" tricks in smtp transport agent are related to what
you are looking for, although those don't do 5 parallel sessions
either, merely 5 successive deliveries of the same message with
separate MAIL FROM addresses.
1) New code at SMTP-ta to enable the 'host' part to be full
user address, and make changes into router scripts to have
them produce the address quad as channel/user/user/priv
This gives parallel deliveries to the system.
2) New code at SMTP-ta to control behaviour somewhat alike
the present "ezmlm" to split deliveries into N ( << 100 )
rcpt per transmission. Also to limit the number of delivered
messages per connection...
All those are what I call "anti-performance" features, but out
there are a few ISP sites which presume they can e.g. limit
the number of messages delivered in single connection.
Of course the _spammers_ send single recipient single message
per session, only weird systems running busy lists send
multirecipient multi-messages per connection...
For the 2) there needs to be some better way to make
parametrization, than at scheduler's command line..
I have though of a few ways, including something which
does greatly resemble scheduler.conf file syntax...
> Daryle A. Tilroe
/Matti Aarnio <firstname.lastname@example.org>
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