Added Test option for testing email authentication settings.
Changed activity log delete button to allow deletion of all logs, or just individual ones.
Added log message to advise user that the MessageSender service must be installed on the same computer as the database. This appears if MessageSender can't find the data folder.
Added check to only clear message queue if messages have been successfully processed.
MessageSender now checks the response code from the mail server and adds message to be cleared only if response code 250 is received.
Changed the way recipients are added to emails.
Changed the formatting of some log messages.
Add an activity log message that advises that the MessageSender is not active if it is not active.