New account password changing

I was in a mm trade and the MM notified me of this :

The ability to change your password requires a valid email address registered to the account for added security.

(He is trusted and he will not be released unless he okays it)

How long has this been around?

 

OMG you didn't use me as your MM babe, what happened?

Its been around for a few days now, its a new update that occurred just recently.