Re: Use a Pi2
On top of this I use a different email address for every company or org I deal with. Just cut them off if they don't honour the unsubscribe etc.
This is one of the best bits of running your own mailserver - you can allocate and destroy email addresses on a whim. None of this easily-defeated "email@example.com" addressing - you can have genuinely unique addresses for every single contact. And when they become a pain in the arse, they suddenly don't get to send you any email...