Please help to know how e-mail change Password recovery

Hello
First I want to thank the location-based administration it is a great location to create a blog.
And sorry for the mistakes that I do not know English well.
Question:
How to change your e-mails to reset your recovery password.
How registered mail that it has established a code of its change.
I want to change my e-mail addresses
Please help to know how e-mail change.
A user name and password I know, but I'm afraid of my email stop
So I want to change in a icloud apple

http://store2.up-00.com/2015-07/1437574890451.png

http://store2.up-00.com/2015-07/1437574890451.png

You can change your email in "Altervista data" under the "Users" menu of your blog.