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