Sometimes your business email fills up faster than expected, even if you initially thought you had enough storage. If this happens, you have two options: try deleting messages from your storage space or upgrade to a larger plan.
How Can I Upgrade to a Larger Plan?
By logging into your Rackhost account and using the Upgrade Plan button in the Services, Emails menu, you can upgrade to a larger plan and increase the amount of email storage space available to you. You will automatically be credited for the remaining period of your current business email service. Once you have upgraded, the one-year period of your business email service will start again.
It may also be the case that only one mailbox is full, in which case cancellation is an option, or the mailbox’s storage space may be increased in proportion to the plan quota.