Archived posting to the Leica Users Group, 2001/08/16

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Subject: [Leica] duplicate messages: a discovery
From: Brian Reid <reid@mejac.palo-alto.ca.us>
Date: Thu, 16 Aug 2001 18:05:10 -0700

Through the years there have been various grumblings from LUG subscribers about duplicated email. I usually check these complaints carefully and I never found anything.

A few weeks ago many of you will remember an onslaught of duplicate messages which I ultimately tracked down to Ngoi Sing Teck in Myanmar who was (probably without knowing it) looping hundreds of messages from his inbox back to the list. I added a mechanism to the LUG software that blocked such messages, and I haven't had any complaints about duplicated email since.

I installed this loopback-preventer on July 23. Since then there have been dozens of people looping back a message or two. The guilty software has always been Microsoft Outlook (never Outlook Express). I never would have discovered the problem had it not been for the avalanche of looped-back messages from Myanmar, but there wasn't another avalanche.

Today michaela@kirk.ca looped back 190 messages to the LUG, which would have been delivered to all of you had it not been for the prevention software.

Now I find myself wondering two things:

1) What madness in Microsoft Outlook causes it to do this, and 
2) How long has this been going on? 

You probably find yourself wondering one thing:

1) Brian, why don't you shut up and go take some pictures.

Replies: Reply from Andrew Schroter <schroter@optonline.net> (Re: [Leica] duplicate messages: a discovery)
Reply from Barney Quinn <barney@ncep.noaa.gov> (Re: [Leica] duplicate messages: a discovery)
Reply from "clive sanbrook" <clive.sanbrook@virgin.net> (Re: [Leica] duplicate messages: a discovery)
Reply from Henning Wulff <henningw@archiphoto.com> (Re: [Leica] duplicate messages: a discovery)
Reply from Mark Rabiner <mark@rabiner.cncoffice.com> (Re: [Leica] duplicate messages: a discovery)