TL;DR, Check your "promotions" folder!
And now for the entire troubleshooting: You`re soooo close to finishing all your quests, but you haven't received your confirmation email yet?
You can manually search for an email from: email@example.com
Or you can check your promotions folder, as it seems that the email ends up in that folder for some of our players.
If that is the case, would you be so kind as to help other players out by dragging the email verification email to your Primary inbox? It tells Gmail that our correspondence isn't a promotional email.
Thanks for doing that and helping out!