Added getDefaultMailSender method to mail_dispatcher.
Added getDefaultMailSender method to mail_dispatcher.

Will be used to determine from which mail address we should send an email.

Patch by: Lennard de Rijk
Reviewed by: to-be-reviewed

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging