Configuring PGP in Options
In order to use PGP, you must first configure it in your Options.
Enable PGP functionality?
If this option is selected, you will be able to create/view your personal
  PGP keys, add/delete public keys from other individuals, read encrypted
  mail, verify digitally signed mail, and encrypt/sign your outgoing mail.
If this option is not selected, you will not be able to use any of the
  PGP features.
Attach Public Key
If selected then a copy of your PGP public key, if it exists, will be
  attached to the outgoing message.
Scan Text Bodies
If selected then the body of all text messages will be scanned for PGP
  data, and display the results if any data is found.  Note that this may
  slow down the system as every text message must be scanned in its
  entirety for PGP data.