I've been using ProtonMail for a while now and it works very well, they also offer a drive, calendar, password manager, VPN; you can choose if you want all the features or just email.

I also tried Tutanota and they do a good job as well, they're a smaller company and don't have as many features as Proton but if all you need is reliable, private e-mail, it's a good option.

Haven't seen his answer here yet, but I use Zoho. It has a free tier IIRC and supports custom domain.

Not sure how private it is, tho.

For privacy, I believe Proton Mail https://proton.me/mail has been the standard.

Paid Proton Mail with my own domain name and own PGP keypair. Although it now has a way to securely search mail, I use the bridge service to allow Betterbird mail to sync my mail to my PC for searching.

I use Tutanota I think it's a really good private email client.

Migadu they are super affordable. Great service. Privacy focused.

ProtonMail because they're at the very least non-intrusive and don't have a track record of snooping through emails, google im looking at you mf

Honestly, gmail for bills and that kinds of stuff. iCloud for personal stuff. I do not really use email that much other than getting spam. I imagine that is true for most people. I do not understand why the privacy community is so obsessed with private email. Are you really using it for stuff that needs to be so private?

proton's honestly a great deal if you're gonna use the VPN and Password managers. nice easy drop-in replacement for Gmail imo, not much point putting a ton of effort into it since email is inherently insecure