sendmail message splitting defeats bandwidth savings?

Peter Peters P.G.M.Peters at
Tue Nov 4 09:55:28 GMT 2003

On Mon, 3 Nov 2003 11:04:07 -0500, you wrote:

>> > 3. MailScanner scans and re-queues all of the (now many) messages.
>> > 4. Sendmail delivers the messages, one copy per recipient,
>> resulting in the
>> > original message being sent MANY TIMES over the wire to the next MX.
>> Even if MS will do this trick i think mailvolume increase is
>> the only way
>> to accomplish this approach.
>Yes, but again, the question is *how much* it ought to increase.  The
>current approach has the potential to increase it drastically, with most of
>the increase being completely unrelated to productive mail filtering.

I checked and I got 4.500.000 messages last month. The total number of
recipients was 4.900.000. So splitting it would increase the load with
9%. I wouldn't call that drastically.

Another advantage I see is that the for clause is put into the Received:
headers. So people can see for what address the e-mail was originaly
received. We have a lot of user with a number of addresses and they
complain that sometimes they can filter on the original address and
sometimes they can not.

Peter Peters, senior netwerkbeheerder
Dienst Informatietechnologie, Bibliotheek en Educatie (ITBE)
Universiteit Twente,  Postbus 217,  7500 AE  Enschede
telefoon: 053 - 489 2301, fax: 053 - 489 2383,

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