Archived posting to the Leica Users Group, 2002/04/15

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Subject: Re: [Leica] Re: Duplicate messages
From: John Collier <>
Date: Mon, 15 Apr 2002 09:04:47 -0600

See below:

On Monday, April 15, 2002, at 06:14 AM, Allan Wafkowski wrote:

> It happens off-and-on to me. I've tried everything that was suggested 
> on my end to no avail. It comes and goes, and I live with the flow.

> Gerry Walden wrote:
>> I have just signed on after a week away, and I appear to be getting
>> duplicate messages.
>> Is it just me?

From: Brian Reid
Date: Wed Feb 23, 2000  08:07:37 AM
Subject: Re: [Leica] More List Stuff

If you get more than one copy of a message, check the time stamp (in
the "Date:" field) and check the message ID (in the "Message-ID:"
field). If they are both duplicated, then the message duplication is in
the transport path somewhere, often in the path between your mail
server and your computer, or even inside your computer. If the Date is
the same but the Message-ID is hideously different (they look
unrelated), the duplication is probably inside your ISP. If the Date
fields differ and the Message-ID field is the same, the problem is in
the software in the sender's computer. If the Date and Message-ID
fields both differ between duplicated copies of the message, then they
are in all probability being sent more than once by the sender.

The most common cause of message duplication is an ISP running out of
disk space on their mail computer. The mail is delivered to your ISP but
its disk fills up, and the sending ISP has no way of knowing whether the
message got through before the disk filled up, so the sending ISP's
computer does not mark the message as "delivered", and tries again to
deliver it half an hour later.

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