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>This is the only addon i have found that iscreases the filter actions.

Custom filter actions were only recently added (by me) to the Mozilla mailnews core code recently, so this has not been possible until TB 3.0 beta 1.

>when certain emails arrive and are filtered, I want to send mail to a third email address

This is not specifically supported by the FiltaQuilla extension. There is however a filter action to launch a particular program using the operating system. If you could write an operating system batch file that could send the email that you want, then the "launch" filter action in FiltaQuilla could fire it. I don't know whether TB itself includes a call that could be made from the operating system to send a template.

"pass about one to two pages of text or html message body into a file (ignore attachment)"

I know that "ignore attachment" sounds easy, but that forces MIME processing of the message, which is an additional complication above the requirement to pass the message text to an external program. The issue of doing MIME processing of messages before filtering is a complex one, that affects the ability of filters to manage attachments. I don't see myself likely to tackle that issue in the near future, unless some agreement is reached in the base code on how to accomplish that.