You can upgrade the mailbox to unlimited capacity through the page, the operation process is as follows:
1. Log in to the mailbox and click \"Folder\" in the upper left corner;
2. The upgrade button is displayed above the folder list opened on the right, and click \"[Mailbox upgrade unlimited capacity]\";
3, enter the mobile phone number, click Next;
4. According to the prompts on the page, send the verification information to the specified number for confirmation, and click next according to the prompts;
5, the page will pop up a message, has been upgraded to unlimited capacity.