It was a security patch that caused this. We don't use Outlook for our email mailer because that would incur costs (of another copy of Outlook) and will break as Microsoft changes their system.

Here's something free and similar to what we use. -> http://www.beyondlogic.org/solutions/cmdlinemail/cmdlinemail.htm

Best of luck,

Bob

PS. Outside of not updating Outlook, I've yet to find a solid cure.