Why am I not receiving emails from my Y!A contacts?

I haven't received an email stating one of my contacts has asked a question. I check my network and I see that some of my contacts have asked questions. I looked at my information and nothing has changed. All the stuff is the same as the day I joined. A few weeks ago, I accidentally spammed emails from Y!A, but I switched it back and started getting the emails again. I've checked my spam emails and none of the questions are there. Then this started. I noticed last week I wasn't receiving those emails, but I did get emails from Y!A when I got a best answer. Why would I get those emails from Y!A and not get the questions my contacts ask? It doesn't make sense.