SENDER UNKNOWN

SENDER UNKNOWN is a specification given to an Email addresser unknown to the Email System's database.

The identities of these anonymous mailers vary depending on the email:


 * The unknown sender of the email from the Holiday Nice List collection is Santa Claus.
 * The unknown sender of the email from the Holiday Naughty List collection is Santa Claus.
 * The unknown sender of the email from the Brainiac Incursion briefings is member of Brainiac's Forces.