Junk Mail – Auto Filtering

 I have customers that I've been emailing for years. All of the sudden, random mail is going to my spam folders for all of my windows live mail email accounts. I have auto filtering turned off and have always had it turned off. But yet it filters anyway. I don't understand thing and I am missing emails. No auto filter should mean that all mail comes into my inbox, right?  Well that is not happening. How do I fix this and what the heck happened. This started about a week ago. PLEASE HELP