If you're looking for a secure and private email service that also accepts bitcoin payments, you have a few options to choose from. Here are four email services that accept bitcoin payments for their premium plans:

1. ProtonMail

ProtonMail is a secure, encrypted email service based in Switzerland that accepts bitcoin payments for its premium plans. It offers various levels of privacy protection and a range of features, such as the ability to set expiration dates on emails and the option to use two-factor authentication for added security.

2. Hushmail

Hushmail is another encrypted email service that accepts bitcoin payments for its premium plans. It offers a variety of features, including the ability to send self-destructing messages and create disposable email addresses. Hushmail also allows users to set expiration dates on emails and offers two-factor authentication for added security.

3. Tutanota

Tutanota is an open-source, encrypted email service based in Germany that accepts bitcoin payments for its premium plans. It offers a range of security features, including end-to-end encryption and the ability to create disposable email addresses. Tutanota also allows users to set expiration dates on emails and offers two-factor authentication for added security.

4. CounterMail

CounterMail is a secure email service that accepts bitcoin payments for its premium plans. It offers features such as encrypted storage, the ability to create disposable email addresses, and the option to use a USB key for added security. CounterMail also allows users to set expiration dates on emails and offers two-factor authentication for added security.

It's important to note that while these email services offer added security and privacy features, they may not be completely foolproof. It's always a good idea to take additional measures to protect your privacy and security online.

In conclusion, if you're looking for an email service that accepts bitcoin payments and offers added security and privacy features, all email services mentioned on this article are all worth considering.