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Does someone know where I can get documentation on the Mozilla Wiki or Mozilla Developer Network. I mean the menu you get when you right-click a message and go to tag. You see this.

  1. Important
  2. Work
  3. Personal
  4. To Do
  5. Later

Specifically, I want to understand how it manipulates the email itself, not the UI.

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up vote 0 down vote accepted

Does this have anything to do with your question? It looks like it adds a X-header to the message.

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Somehow I missed that. Probably because I decided to look at the the message headers in Thunderbird and not the raw MSF files in the profile folder. That wiki page also links to a much more thorough explanation outside official resources based on a snapshot of the source code. – ajstein Aug 18 '11 at 15:57

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