Well, I like your implementation :). This is the so-called "quick search" by the way, which works as a filter and displays results in the inbox. There is also

Well, I like your implementation :). This is the so-called "quick search" by the way, which works as a filter and displays results in the inbox. There is also another search feature in Thunderbird which renders results differently. I never got used to that, and never used it, as I found its semantics unpredictable.