I woke up to 589 notification emails this morning... Talk about a PITA, there were about 15 legitimate ones buried in there that I had to wade through to find.
I have had this happen to me several times. Each time I have had to set up a throwaway gmail account to use for DIS, then just forward that account to my main email where I see them. It's the only way I found to fix it.
I just turn that feature off in my profile. Nothing being discussed here is that urgent. The next time I visit this site, I can glance over any new posts/topics. Getting an email for every new item just clutters your inbox.