Re: Low priority transport...

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Autor: Nigel Metheringham
Fecha:  
A: Philip Hazel
Cc: John Henders, exim-users
Asunto: Re: Low priority transport...
} On Fri, 26 Jul 1996, John Henders wrote:
}
} > Smail's one connection per delivery is death on MS Mail gateways, for
} > example, and I've found it a problem with some busy unix hosts as well.
} > So, in this case, I created a driver that handed the mail off to a copy
} > of sendmail in queue-only mode. Then sendmail would deliver all the mail
} > in one smtp connection and everything worked fine. However, I was hoping
} > to avoid such tricks in exim.
}
} Exim certainly does better than smail. I saw it deliver about 20
} messages down one connection the other day.

Interestingly there is an argument related to this going on the qmail
list.
qmail delivers, AFAIK, one message per smtp connection (just like
smail), actually I think its worse in that I think that a message to
n recipients all with the same MX destination (and even the same
destination domain) take n connections. There are arguments about
this related to latency, and doing something else will probably break
the security model, but I can now see *why* 20 simultaneous sends are
needed!

    Nigel.




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[ Nigel.Metheringham@???   - Unix Applications Engineer ]
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