There are many occasion when a person feels to change his/her email address, be it out of sheer necessity or choice.
If you want to continue getting newsletters, summary of the bank statement (from your respective bank) and other letters from office or your relatives etc, change of address email is necessary.
You have to update information about your current address if you want to be contacted, and the best way to do it is by sending an email.
In the opening paragraph of the email, tell the concerned person whom you want to notify about the change in address. Specify different reasons why you are changing your address. Request that person to contact you at your new email address in the near future rather than the previous one, to ensure that effective communication is established.
Attach a file to the email containing your previous and new address and do notify that person about the attachment. End the email with a professional salutation including your name and telephone number.