I'm just wondering why wordpress doesn't send confirmation mail every time user change his/her email address.

How do we know that email address is not fake or mistyped?

So can anyone give me some snippet to implement this function?

I'm just wondering why wordpress doesn't send confirmation mail every time user change his/her email address.

How do we know that email address is not fake or mistyped?

So can anyone give me some snippet to implement this function?

Update:

Here is the idea.

1. user changes his/her mail
2. We send confirmation email.
3. If the user confirm that email in X days by clicking confirmation link, then the email should be changed. Else we should use existing email.