I use Thunderbird pretty much just for FiltaQuilla extension, which runs shell commands when email matching some filter arrives. It would be nice to have this f

I use Thunderbird pretty much just for FiltaQuilla extension, which runs shell commands when email matching some filter arrives. It would be nice to have this functionality built-in and extended (e.g. email data could be passed to stdin). The biggest drawbacks is overall slowness (especially when syncing with server) and search UI (which really needs to be condensed). BTW it would be nice to have option to search for all mails involving some address by just right-clicking the address, like in Mailspring.