PGP/GPG Key ID

Type your public key in the text box. 

Always sign outgoing messages when using this account

Select this option to attach an encrypted signature to all messages that you send from this email account. 

Don't sign meeting requests (for Outlook compatibility)

Select this option if you do not want to attach an encrypted signature when you send meeting information to attendees in Calendar.

Outlook cannot accept meeting requests with encrypted signatures. Select this option if any of the meeting attendees use Outlook.

Always encrypt to myself when sending encrypted mail

Select this option to always send a copy of your encrypted messages to yourself in encrypted form. 

Select this option if you want to be able to decrypt the encrypted messages that you send, for example, in your Sent folder or Outbox folder.

Always trust keys in my keyring when encrypting

Select this option if you do not want to validate the public keys of contacts who are in your public keyring when you encrypt a message. A public keyring is a file that lists all of the public keys that you know.