FYI, there is less interest in email than at any time recently. I can tell you that because I track the space closely because I run EmailAddresses.com and several other email-related sites. Probably because people have settled on Gmail, Hotmail, Yahoo Mail or another "biggie" and only really change if they're moving to email under their own domain name.
It's still a huge market, but search volumes have shrunk dramatically compared to 5-10 years ago.