Email wasn't designed with privacy in mind. 

Most emails are transmitted in plain text, making them easily readable by anyone who intercepts them, including governments, service providers, and malicious actors.

If you must use email, encryption is essential to protect your privacy. The best way to encrypt email is using PGP (Pretty Good Privacy). It allows you to encrypt the content of your emails so that only the intended recipient with the correct private key can decrypt and read them.

But PGP can be cumbersome for everyday use, requiring both parties to have the necessary software and keys set up. In contrast, using privacy-focused messaging apps like SimpleX, which offer end-to-end encryption by default and has no user IDs, is a more secure and user-friendly alternative to email for sensitive communication.