Tutanota Mail vs Posteo

End-to-end encrypted:

• internal emails (between Tutanota users)
• external emails: requires setting a password and sharing it separately to the recipient
• calendar
• contacts
• email storage
• email subject lines

See here.

Tutanota's servers are located in Germany, which has strict privacy protection laws, even stronger than those of Switzerland.

A free account is available.

Posteo is ad-free with no ads when using their email services.

Posteo supports email clients such as Thunderbird and Claws Mail which will allow for greater control over encryption and user's private keys.

Registration through VPN is allowed and no personal information is required, just a username and password.

Posteo does very well on Dismail's server list and it supports end-to-end encryption with PGP. This can be done in the browser or with an email client, and Posteo has a help section on how to set up encryption.

You can select an option to encrypt inbound email from their server with a user-provided GPG key.

You can select an option to encrypt all of your emails stored on their servers.