Archived posting to the Leica Users Group, 2002/08/17

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Subject: RE: [Leica] attention Singnet.com.sg subscribers
From: Brian Reid <reid@mejac.palo-alto.ca.us>
Date: Sat, 17 Aug 2002 22:16:11 -0700
References: <000001c24668$0d8eca40$825abada@dustpuppy>

> Hi
>
> Hey! Wat did I do?
>
> Uhmmm.....i haven't been posting THAT much - I think only a total of 2,
> so does this mass mailing happen only if I post something to this list?
>
> Red Dawn

The Singapore duplicate messages can happen even when the person causing it has never posted anything.

If I knew just what was going on, I would tell you. If I knew who was doing it, I would tell you. Singtel won't tell me. There is some command, some action, some process or filter, that an Exchange user can ask for, which results in all of the messages that the person has received being re-transmitted as if for the first time. I don't know if the command being issued is "move", "delete", "copy to folder", or "retransmit all to original recipient". But the net effect is that messages in soneone's inbox in Singapore are all being re-transmitted to the same address to which they were originally sent.

The duplicates are not reaching the LUG because I have software in place to notice this and filter them out. But the LUG computer is being burdened by having to filter such a large number of messages.

If you get duplicates of messages, you need to look at the headers to see where they differ. The haders of a message look like this. The key to look at is the ESMTP id of your own mail host. If that ID is the same, then the duplication is probably happening inside your ISP or inside your computer. If it is different, then the duplication is happeing upstream. If you study the headers carefully you can always see where the duplication is taking place by looking at where the headers differ between the two duplicated copies.

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Date: Sat, 17 Aug 2002 22:08:01 -0500
From: Michael Gerard <geeman1066@earthlink.net>

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In reply to: Message from "Red Dawn" <reddawn@singnet.com.sg> (RE: [Leica] attention Singnet.com.sg subscribers)