As a sender:

• delegate(s) need to be authorised for email encryption in order to encrypt a message to be sent "on behalf"
  
  Example: John Smith needs to be authorised in order to send an encryopted message as "John Smith on behalf of EUI Office of Studies"
  
  
• the functional mailbox needs to be authorised for email encryption in order to encrypt a message to be sent directly from the functional mailbox.
  
  Example: EUI Office of Studies needs to be authorised in order to send an encrypted message as "EUI Office of Studies"

As a recipient (external to the EUI):

• delegate(s) may need to login into the functional mailbox directly in order to access an encrypted message sent by the EUI
  
  Example: Gina Smith may need to login directly into the functional mailbox Company Petty Cash even if she is a delegate

As a recipient (internal to the EUI):

• delegate(s) will always be allowed to access encrypted messages sent to EUI functional mailboxes by other EUI members
  
  Example: if John Smith is a delegate of EUI Office of Studies mailbox, he will access any encrypted message sent to EUI Office of Studies