Great Circle Associates Majordomo-Users
(April 1995)

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Subject: Re: best way to deliver large lists?
From: Brian Behlendorf <brian @ hyperreal . com>
Date: Wed, 12 Apr 1995 15:24:43 -0700 (PDT)
To: Tom Limoncelli <tal @ big . att . com>
Cc: Kevin at Freeside Support <kevintx @ fc . net>, list-managers @ GreatCircle . COM, majordomo-users @ GreatCircle . COM
In-reply-to: <>

On Wed, 12 Apr 1995, Tom Limoncelli wrote:
> > Does anyone here have suggestions for getting messages out to a large
> > subscriber list (which invariably contains undeliverable addresses that
> > seem to *drag* sendmail's delivery to the entire list down time after
> > time) with a little more efficiency/brains than sendmail has wanted to do
> The standard answer to this question is, "Install Sendmail 8.x
> because it does all the sorting, grouping, etc. that you can
> imagine".  Huge mailing lists suddenly use much less bandwidth
> because of all of this.

Er, yes, it uses ESMTP, but you still have to do delivery to N domains, 
and given that it takes an average of M seconds per domain (which 
given a fat enough pipe doesn't vary with what else is going over 
that pipe) that's N*M seconds to complete the job.  A better solution is 
to split up the lists into X well-balanced sublists, so that delivery 
takes N*M/X seconds instead (modulo variations in delivery time based on 
what heuristic you used to create those sublists).  Sounds like that's 
what bulk_mailer does.


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