That would be the 1980s approach. I would be more interested in being able to read an email and then say something along the lines of:

  in context/mail:
    when today/evening:
      if content excites me:
        send alert

This should be available directly by pressing some code button, and there should be some kind of user interface that makes it trivial to enter these commands.

That is outlook.

There is no reason to have an os or a language dedicated to such specialized tasks.

Yes there is, at least to me. The reason being total freedom to tune the operating system, and not being limited to what someone imagined I would want to do in the future.