Why are my valid emails being suspended after bouncing?

Hi-- I watched your video about suspended email addresses, saying that an email is suspended after an unsuccessful try or two. I have emails that bounced and were called "suspended" the first time I sent to that address. What's the deal? Does your system include anytime any of your clients tried to email the person I'm trying to reach? If it's based solely on our account, then something is broken. It shouldn't bounce an address and call it suspended on the first try, right?