Use an email service that supports encryption
Create or obtain a public/private key pair
Share your public key with the recipient
Import the recipient’s public key into your email client
Verify the recipient’s key fingerprint if possible
Enable end-to-end encryption in your email client
Compose your email
Encrypt the message before sending
Send the encrypted email
Ask the recipient to use their private key to decrypt it
Use a secure password for any encrypted attachments
Keep your private key protected and backed up
Update your encryption software regularly