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How to Free Outlook Storage When Your Mailbox Is Full
Question details
The user needs to free up storage space in Outlook because their mailbox is full, preventing them from sending or receiving new emails.
- Product
- Microsoft Outlook
- Device & OS
- not provided
- Scenario
- Managing a full Outlook mailbox to restore email sending and receiving capabilities.
- Observed behavior
- The mailbox has reached its storage quota, causing failures in sending and receiving messages. Deleted and archived items are still consuming storage space.
Verify your Outlook account type (e.g., Outlook.com, Microsoft 365, or university account) as storage limits and administrative policies may vary by organization.
Empty the Deleted Items and Junk Email Folders
Permanently delete items that are no longer needed to instantly free up space in your mailbox.
Many users do not realize that moving emails to the Deleted Items folder does not free up storage. These files still count against your quota until they are permanently removed.
Navigate to the 'Deleted Items' folder in your Outlook sidebar navigation pane.
Right-click on the folder and select 'Empty Folder' from the context menu to permanently delete all contents.
Repeat the same process for the 'Junk Email' folder to maximize your reclaimed storage space.
Filter and Delete Emails with Large Attachments
Targeting large attachments is the fastest way to reclaim significant mailbox storage.
Looking for a Lightweight Microsoft Office Alternative?
While you manage your Outlook storage limits, consider switching to WPS Office for your document management. It offers a free, lightweight, and fully compatible alternative to Microsoft 365, ensuring seamless productivity without bloating your system.
- 1. Download the Installer: Visit the official WPS Office website and click the free download button.
- 2. Install the Software: Run the downloaded setup file and follow the quick installation prompts.
- 3. Open Your Documents: Launch WPS Office and open your existing Microsoft Office documents seamlessly.
Frequently Asked Questions
Do archived emails count toward my Outlook storage quota?
Yes, emails moved to the Archive folder remain stored on the server and still count toward your total mailbox storage limit. To free up space, you must permanently delete them or export them to a local file.
What happens when my Outlook mailbox is completely full?
When your mailbox reaches its maximum storage limit, you will be unable to send or receive new emails. Any incoming emails will bounce back to the sender with a non-delivery report until sufficient space is freed.
How can I check my current mailbox storage usage in Outlook?
In Outlook on the web, go to Settings (the gear icon) > General > Storage to view a breakdown of your mailbox usage. In the Outlook desktop app, you can find this under File > Info > Mailbox Settings.
Why is my mailbox still full after I deleted several emails?
Deleted emails are simply moved to the 'Deleted Items' folder, which continues to consume storage space. You must manually right-click and empty the 'Deleted Items' folder to permanently reclaim the quota.
