How long will Sina's email be invalid without logging in?

How long will the free mailbox be automatically cancelled by the system when it is not used?

Sina Free Mailbox is a product that provides users with free online convenient and practical e-mail communication. So you can't just cancel the free mailbox.

According to the Sina Free Mail Service Agreement, if the user fails to log in to the account and email provided by Sina for 90 consecutive days, Sina has the right to shut down the receiving system of the user's email, and the user will not be able to receive emails. When the user logs in again to check the account and email provided by Sina. The user's mailbox system will return to normal.

If the user fails to log in and check the account and email provided by Sina for 180 days in a row, Sina will consider that the user has given up the right to use the email account, and Sina has the right to delete the account from the system for others to register and use.