I've been running my own mail server at home for years. But it requires a reliable connection and some maintenance once in a while. And of course it always breaks when I'm on the other side of the world. To free myself of that burden I decided to make the move to Office 365. However I discovered there is no way to set my account as a catch-all account. This is not possible at all! So I made my own scripts to add all email addresses I used in the past as an alias on my mailbox.