[TASK] #5106 Add more specific exceptions AbstractMailer::send

Change-Id: I57f699918eec68b6cd0728b7824316de69d72e0a
Reviewed-on: http://review.typo3.org/32529
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>