About reliable email adresses: I'm using my university alumni "email forwarding for life", but this loses me some emails due to DMARC and friends.
What are the alternatives?
I use Gmail right now, but I could move my domain's email to Fastmail or another provider without _too_ much work.
Of course, it's also a good idea to back up your email archives too, since that _can_ go away with the loss of a provider's service.