How to Manage Email Storage Quota per Mailbox

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.

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View and change a mailbox quota

1. Log in at https://tpc-hosting.com/login and open cPanel.
2. Under Email , click Email Accounts.
3. Find the mailbox you want to manage and click Manage.
4. Scroll to the Storage section.
5. Enter a quota in megabytes (MB), or click Unlimited to remove the cap.
6. Click Update Email Settings.

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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.

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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.

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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.

Updated on: 28/04/2026