How to use the group feature to encrypt content to multiple public keys by using a single address

The group feature is relevant to companies or groups looking to encrypt content to various public keys of the group members while using a single email address as recipient.

To use the group feature:

  1. close all gpg applications and Mail.app
  2. open finder, press ⇧⌘G
  3. paste '~/.gnupg/gpg.conf' without the ' and click Go
  4. open gpg.conf with TextEdit
  5. add the following line at the end of the file
    group staff@mywork.com = fingerprint1 fingerprint2 fingerprints

Whenever you now write to staff@mywork.com the message will be encrypted to all public keys you added the fingerprints of. Note that no valid key must exist for staff@mywork.com for the group feature to work as expected.

See also

  • How to add an e-mail address to an existing public key using key mapping