Each email account has a storage quota — a maximum amount of email it can hold. When the quota is full, new incoming emails are bounced back to senders.
View and change a mailbox quota
- Log in at https://tpc-hosting.com/login and open cPanel.
- Under Email, click Email Accounts.
- Find the mailbox you want to manage and click Manage.
- Scroll to the Storage section.
- Enter a quota in megabytes (MB), or click Unlimited to remove the cap.
- Click Update Email Settings.
Check current usage
On the Email Accounts page, each mailbox shows its current usage and quota next to the address (e.g., 450 MB / 1,000 MB). The usage updates periodically, not in real time.
What happens when a mailbox is full
- New incoming emails are rejected with a bounce message to the sender.
- The account owner cannot send new email from that mailbox.
- Existing email is not deleted — you must free space by deleting old messages from webmail or your email client.
Tips
- Set quotas appropriate to usage — 1,000–2,000 MB is sufficient for most business mailboxes.
- If your hosting plan has limited total disk space, setting individual quotas prevents one mailbox from consuming all available storage.
- Encourage users to delete large attachments after saving them locally, or to use cloud storage links instead of emailing large files.
