You really are an illiterate motherfucker.
ITS LEGIT!
when you create your account, there is a tickbox to stop them sending you things. I DIDN'T TICK IT.
Also if it was a phish attempt, THE LINK WOULDN'T BE TO THE RUNESCAPE WEBSITE.
look at the email. Do you see that link? Oh yeah runescape.com
Now get off my thread.
EDIT: Thanks Zaxxa