If you go into your spam folder and select the replies with a checkmark, you should have an option available in your toolbar to tell the mail program "This is NOT spam". You may have to do this by opening one reply at a time, depending on how your mail program is set up, but at any rate, you can "unlearn" the mail program so that it will stop directing these replies to your spam folder.
If you want, I'll do it when I get home tonight.
Rusty