The mailbox can only modify the user password. If you want to change your email address, you must re-register your application account.
E-mail address, like letters commonly used in real life, has the name and address of the recipient. Its structure is: user name @ mail server, and the user name is the login name you use on the host. Behind @ is the logo (domain name) of the post office service computer, given by the post office.
The format of an e-mail address consists of three parts. The first part "User" represents the account number of the user's mailbox and supports the combination of letters, numbers and underscores. For the same mail receiving server, the account number must be unique; The second part "@" is a separator; The third part is the domain name of the mail receiving server of the user's mailbox, which is used to mark its location.
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