Add ability to send message

https://www.pivotaltracker.com/story/show/78628040
Detects seems to indicate there is a mechanism that has indicators on whether or not something is of a certain state, sniffs something out etc... Dunno... I usually follow the rule: if I expect an exception, the test must have `ThrowsAnException`, so something along the lines of `instantiatingANewMessageServiceWithAnInvalidOrginatorThrowsAnException` or something :tongue: Thoughts?