Help me find a Contextual Menu plugin that will...

[Zoidberg]

Seems to me I recall one that did that; it was ages ago, it seems. Can't recall the name of it.

A few quick finds @ MacUpdate:

http://www.macupdate.com/info.php/id/14303

http://www.macupdate.com/info.php/id/21329

And for all things Mac Mail.app (though he often also reports on other mail clients, incl Entourage):

http://www.hawkwings.net/