You can migrate data between different domain names in Alibaba Mail using the Mailbox Migration feature.
Important
In Alibaba Mail, a single domain name can be attached to only one mailbox service. For example, if example.xxx is already attached to a Standard Edition mailbox, you cannot use it to request a Premium Edition mailbox.
For more information about mailbox migration, see Mailbox Migration.
To back up emails from your original mailbox to a local computer, you can configure an email client to download them. For more information, see Client Configuration.