Outlook Thread Compressor download now available

Nearly a year ago, I wrote about Thread Compressor on here – it’s an add-in to Outlook which removes unnecessary emails, on the assumption that most people reply to mail and leave the original intact, so you could keep the last mail in each branch of a thread, and remove all the others.


Way back when I was still developing TC, I tried to get it included on the Office Downloads section of Microsoft.com, but our legal department was (with some justification) very nervous about us offering a download which would go through the end user’s mailbox like a dose of salts, deleting stuff. So it stayed (more or less) an internal tool: I even started developing a “version 5” with a much groovier UI and some extra features.

Included in the v5 beta (which is a real pain to install nowadays – the previous v4.2.030 version has nearly the same feature set and is a lot more self contained), was a piece of logic which captured stats on TC usage and emailed them back to me.

Since many people at MS are still running that beta (it’s a long story, but the source code went south so it’ll never get out of “beta” state), I still get maybe 20-30 statistics mails a day…

Since August 2003 when the first statistics email arrived – from me, kind-of naturally – until 24th April 2007 (when I last did an analysis of the stats), TC v5 beta had scanned over 400m email messsages and had compressed over 30m, worth nearly half a terabyte of email data.

To the reader, the spoils

Well, I finally decided – in an “ask forgiveness rather than permission” move – to make the last complete and stable version available for download.


It’s not particularly elegant looking by modern standards (given that most of it was written 7 years ago in VB6) but it does work, even on Windows 7 (x86 and x64) and Office 2007. Basically, anything post-Office 2000/Windows 2000 should be OK.

A reader called Mark Ruggles emailed me the other day and said:

“It is fantastic and it works like a champ in Outlook 2007. I turned it loose on my Inbox and my archive and I deleted 103Mb of redundant data. I sent it out to some of my colleagues and my manager used it cutting his archives down by 2Gb.

This is the coolest utility I’ve found in a long time.”

So, thanks to Mark’s comment, I’ve now registered www.threadcompressor.co.uk and posted install instructions and a download file up there.

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