@Brennangrinder
If you think that someone used your account, please check the links below:
http://windowslivehelp.com/solutions/accounts/archive/2008/10/25/what-to-do-if-you-think-your-accounts-been-stolen.aspx
http://windowslivehelp.com/solutions/safety/archive/2009/04/29/recent-reports-of-account-hijacks.aspx
For your sending issue, please post the exact error message that you’ve encountered.