Change my Email address on my GW2 Account?
To specify the question is, How do I change my GW2 Email information.
Write a ticket to support. They can do it.
ArenaNet Communications Manager
Please contact Support by filing a ticket through the “Ask a Question” tab on that linked page. They will be able to assist you. And they will need to verify the account belongs to you, so for tips on what information to provide in a ticket, please read this post and provide as much as possible to expedite the ticket.
Gaile Gray
Communications Manager
Guild & Fansite Relations; In-Game Events
ArenaNet
Communications Manager
Guild & Fansite Relations; In-Game Events
ArenaNet