User:David MacQuigg/Sandbox/Email agents

Actors and Roles

Actors include Users and Agents
Agents may play more than one role
Typical roles include Transmitting, Receiving, Forwarding, and Delivery.
A Border shows where there is no prior relationship between Agents.
--> Direction of mail flow (no statement as to relationship)
==> Direct relationship between Actors (e.g. a contract)
~~> Indirect relationship (e.g. both directly related to Recipient)
A/B Roles A and B both played by the same Actor