@lazylemur I'm a big fan of #Fastmail combined with my custom domain.

They have a catch-all alias system that allows me to create unique login addresses per each online service (ex: mastodon@..., lemmy@...), which significantly reduces my attack surface of data breaches while allowing me to check which services have leaked my email address, since I can check the TO field from any spam email addresses I get.

I also use Fastmail to store my CardDAV contacts that I sync to my phone via DAVx5.