When you are ready to start traveling again and need to use your Traveling Mailbox, simply resubscribe by logging into your billing portal at https://travelingmailbox.com/my-account ... Click Subscriptions > Reactivate.
Note: Your account is only available if you reactivate within one year of your previous cancellation/suspension. If you reactivate after one year, you will be assigned a new mailbox with a new mailbox number.