Formats the address as a human readable string, not including the route.
The resulting string is intended for display purposes only and cannot be
used for transport purposes.
For example, if the unparsed address was
this method would return
which is not valid for transport; the local part would need to be
includeRoute - true if the route should be included if it
exists, false otherwise.
Returns a string representation of this address that can be used for
transport purposes. The route is never included in this representation
because routes are obsolete and RFC 5322 states that obsolete syntactic
forms MUST NOT be generated.