Doc Summary
A mailbox full issue occurs when an email account runs out of storage space.
When this happens, new emails cannot be delivered to the mailbox.
This affects both Email Hosting and Web Hosting packages that include email services.
What Happens When a Mailbox Is Full #
When a mailbox reaches its storage limit:
- Incoming emails may be rejected
- Senders may receive bounce messages
- Emails are not queued for later delivery
Delivery stops immediately until space is freed.
How to Identify a Full Mailbox #
Signs of a full mailbox include:
- Bounce-back messages mentioning storage limits
- Errors when receiving email
- Missing or delayed incoming messages
Mailbox usage can be checked in cPanel.
Where to Check Mailbox Usage #
To view mailbox usage:
- Log in to cPanel
- Go to Email Accounts
- Check the storage usage per email address
This shows how much space is used and available.
Common Causes of Full Mailboxes #
Mailboxes often fill up due to:
- Large attachments
- Accumulated spam or junk mail
- Old sent emails
- Trash folders not emptied
Even deleted emails may still count until fully removed.
How to Free Up Space #
To free up mailbox space:
- Delete old emails
- Empty Trash and Junk folders
- Remove large attachments
- Archive emails locally if needed
Changes apply immediately once storage is freed.
Increasing Mailbox Storage #
Mailbox limits can be adjusted if:
- Your hosting package allows it
- Total package storage is available
Storage cannot exceed package limits.
Preventing Mailbox Full Issues #
To avoid future issues:
- Monitor mailbox usage regularly
- Clean spam folders periodically
- Avoid using email for large file transfers
- Set realistic mailbox limits
Preventive maintenance is essential.
What Not to Do #
Do not:
- Ignore mailbox usage warnings
- Assume emails will queue automatically
- Rely on spam filters alone to manage storage
Full mailboxes require manual action.
Responsibility Notice #
You are responsible for:
- Monitoring mailbox storage
- Managing email data
- Preventing storage overuse
ProRedLine does not automatically clear mailboxes.
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