For mail hosting, take a look at Posteo.de (no custom domains though), mailbox.org, runbox.com, mailfence, migadu, and cranemail. All these are cheaper and a lo

For mail hosting, take a look at Posteo.de (no custom domains though), mailbox.org, runbox.com, mailfence, migadu, and cranemail. All these are cheaper and a lot more affordable than something like Fastmail. All of them support IMAP, using which you can move your email elsewhere (or easily backup/have local copies).