I think that I tracked my spam to the following exploit: http://thenextweb.com/insider/2013/01/31/yahoo-mail-users-still-seeing-accounts-hacked-via-xss-exploit

I think that I tracked my spam to the following exploit: http://thenextweb.com/insider/2013/01/31/yahoo-mail-users-still-seeing-accounts-hacked-via-xss-exploit-amid-reports-yahoo-failed-to-fix-old-flaw/ http://thenextweb.com/insider/2013/01/31/yahoo-mail-users-st... If you ever shared anything with somebody using Yahoo email your email is already in the wild.