I’ve been a Fastmail user for years, having left Gmail. It works great and have nothing be but praise for them. I use my own domain with them so if I decide to leave it’s not an issue worrying about updating people with my new email.
replies(8):
After Fastmail I went to Migadu, and it's absolutely great. I have never seen support requests getting answers that quickly :-).
https://migadu.com/guides/identities/
I can send as the address, and emails arrive in my normal mailbox. I also use them for giving self-hosted services their own address/password to email me.
I've been using identities created in the admin panel, but they do have subdomain addresses where everything to *@user.domain goes to user@domain, and you can configure a 'Catchall' address (and of course 'plus addresses'). I haven't used either though.