Thunderbird add-on filters messages saved in folders.
One of the biggest benefits of this add-on is that it allows you to run your message filters automatically on outgoing emails after sending. In other words, it acts as an outgoing filter for Thunderbird which saves you a lot of time and effort when managing your inbox.
The best part about the Send Filter extension is that it works on multiple platforms including Mac OS X, Windows, and Linux. Therefore, no matter the operating system you're using, you can still take full advantage of its features.
In summary, if you're looking for an add-on that simplifies your email filtering process, the Send Filter extension is an excellent choice that you won't regret installing.
Version 1.0: N/A