I've recently switched from using Mutt to Thunderbird at work. The only feature I really and truly miss is the ability to run external programs as part of the message filtering process - just like good old procmail used to let me do (or Perl's Mail::Audit). Thunderbird lets me sort messages into folders, but I need to do things like:

• Modify the body of a message
• Add a header
• Run another program based on the contents of the message
• Bounce the message to another address

Does anybody have an extension for Thunderbird to let me run Perl or Python programs on an incoming message? No? Am I going to have to write this myself?

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