The Spaminator...
I am tired of SPAM and want an absolute way to control it. Rules work on specifics. Microsoft is lame because it requires you to select the Junk Mail option in order to manually assign items as Junk Mail. It then applies its own internal Junk Mail guestimator, over which the user has no control except to turn off the Junk Mail option.
I have recommended the Spaminator to Microsoft and they have turned a blind eye. With the advent of Haiku, there is potential to set a new standard in email services.
I am currently an MS Windows / Outlook user so the suggestion follows on that.