EN / Fighting emails - empty Subjects

I am getting tired of email "messaging" within corporation. 80 emails a day to handle within a few minutes between meetings.

Moreover some senders do not fill Subject at all - how the hell I could quickly recognize if I should even read the email?

One thing, which helps: filter rule to auto-respond on such emails without Subject...

A nice idea how to setup such rule for Outlook is on Outlook Blank Email Message Filter/Rule - Wes' Puzzling Blog

Just beware that the server response does not include the message and therefore the wrongdoer would not know which message you are referring to.