Something really weird has happened. My niche site has suddenly been bombarded with responses from a survey that I've been running since the beginning of the year. The responses are still flooding in and they been doing so for the last two hours. At one point I couldn't send or receive emails because of the huge number of response emails all flooding in together. I can't think of any sensible explanation. I usually get about four or five responses in a day. They are now coming in at the rate of about 100 an hour. Any suggestions please?