Yeah, I too get 7 to 8 mails a day plus the ones from the social networking sites. If you, too, are a member of sites like orkut, facebook, twitter, etc. and if you visit your profile daily, then you can turn off the notifications from these sites.
Although, I visit my profile daily but I prefer the notifications because in case I have less time, its easy for me to check my mails, rather than opening other websites. :)