I use ProtonMail like this. If you want multiple users, you either need a Family or Business plan. I started with Business Mail Essentials for my wife and I. I upgraded to Visionary to get more benefits that last time they had a sale.
Proton
Empowering you to choose a better internet where privacy is the default. Protect yourself online with Proton Mail, Proton VPN, Proton Calendar, Proton Drive. Proton Pass and SimpleLogin.
Proton Mail is the world's largest secure email provider. Swiss, end-to-end encrypted, private, and free.
Proton VPN is the world’s only open-source, publicly audited, unlimited and free VPN. Swiss-based, no-ads, and no-logs.
Proton Calendar is the world's first end-to-end encrypted calendar that allows you to keep your life private.
Proton Drive is a free end-to-end encrypted cloud storage that allows you to securely backup and share your files. It's open source, publicly audited, and Swiss-based.
Proton Pass Proton Pass is a free and open-source password manager which brings a higher level of security with rigorous end-to-end encryption of all data (including usernames, URLs, notes, and more) and email alias support.
SimpleLogin lets you send and receive emails anonymously via easily-generated unique email aliases.
You can do individual single user plans if you use sub domains I think?
So say you had smith.com you could setup one account with the bob.smith.com sub-domain and another with sally.smith.com. That works great with wildcards, you can use amazon@bob.smith.com as your Amazon email etc.
The problem with that is what you set as your main email for outgoing etc. you could do something like personal@sally.smith.com or something. (You could just use something on the proton.me domain, but that kinda defeats the point of bringing your own)
Using a family account would let you have bob@smith.com and sally@smith.com but is a lot more expensive. I think it also means you can't get your own wildcard inboxes without adding additional domains for them.
@lynze@mastodon.social not sure if you would have seen my reply here as I didn't reply to you directly. See the parent comment of this if you can?
(Lemmy/masterdon integration is.. iffy)