The solution is to make sure virus protection is up to date. There are no options to set to stop the behavior, you just simply need up-to-date virus protection.
If you don't have up to date anti-virus software Outlook will ask for permission each time a program wants to send an email on your behalf..
Updating my work computers anti-virus definitions(thought IT had it set up to go automatically, but i guess not) solved the problem.
Sorry for the late answer!