How to Fix Outlook Mailbox Full Issue? 6 Easy Solutions

Summary: Is your Outlook mailbox full, and you are searching for methods to solve it? This is a serious concern, and we immediately need to resolve it. This article provides a comprehensive overview of the issue and showcases different techniques to quickly resolve the “Outlook storage full” issue with simple steps. In this guide, you will discover all the possible solutions, the reasons behind the error, and the best ways to fix it.

Outlook is a widely used platform for managing emails, contacts, calendars, notes, tasks, and more. As a result, it’s common for users to end up with a large mailbox. “Outlook storage full after deleting everything”, is the common error that occurs in Outlook due to oversized data. In this blog, we will let you know how to troubleshoot Outlook mailbox full error, and how to reduce PST file size in Outlook.

Outlook stores all data in a PST file (Personal Storage Table) which has some size limitations depending on the different Outlook versions. For example, Outlook 2002 and previous versions have a maximum limit of 2 GB. In Outlook 2003 and 2007, a maximum of 20 GB. In Outlook 2010, 2013, 2016, and 2016, a maximum limit is up to 50 GB.

Why is Outlook Storage Full? – Possible Reasons

There can be several reasons why your Outlook storage is full, even after deleting everything. The following are some of them:

• Large Attachments: Attachments such as documents, images, and videos, can occupy mailbox space and lead to a full mailbox.
  
  
• Neglecting Regular Cleanup: Some users need to regularly delete unnecessary emails from their Outlook mailbox. Improper management of mailboxes can also cause this error.
  
  
• High Volume of Daily Emails: Users who receive a large volume of emails every day can fill up their mailboxes faster.
  
  
• Server Hosting Issues: In some cases, mailboxes can reach the maximum storage storage limit due to Outlook server hosting issues.
  
  
• Improper Account Settings: Improper settings and configurations of Outlook accounts can also restrict Outlook’s maximum storage limit.

How to Fix the “Outlook Mailbox Full” Issue?

Down below, we have mentioned some of the easiest methods to fix this issue. You can follow the step-by-step guide to proceed. The methods are – 

1. Delete Large Emails and Attachments
2. Empty Deleted Items Folder
3. Move Old Items to Archive
4. Use Outlook Cleanup Tool
5. Backup Outlook Entire Mailbox
6. Use Advanced Solution

#1 – Delete Large Emails and Attachments

1. Open MS Outlook, click Search Folder, and select New Search Folder.
2. Select the Large Mail option under Organizing Mail. Click Choose under the Customize Search Folder option.
3. Specify the size in the “Show mail greater than” box. Click the OK button to continue.
4. A new folder “Large Than (which size you choose in the above step)” is created under Search Folders.

Now, go to the Search Folders, click on the newly created folder, and delete your emails that are not very important. You must continue deleting the Outlook storage after deleting everything until the mailbox has enough space for new emails.

#2 – Empty Deleted Items Folder

1. Open MS Outlook and go to File Tab.
2. Select Info> then Mailbox Cleanup.
3. Choose Empty Deleted Items Folder then click Ok.

#3 – Move Old Items to Archive

1. Launch MS Outlook then open the File tab.
2. Go to Info then click on Mailbox Cleanup.
3. Select the folders you want to archive.
4. Check other options as per your choice.
5. Lastly, click the Ok button.

#4 – Use Outlook Cleanup Tool

1. In Outlook, go to File then Info to fix the Outlook Mailbox full error.
2. Click on the Clean Up Toolbox and Select Mailbox Clean up.
3. Specify the necessary details and then Click the Empty button.

Note: The above manual methods can be challenging for normal Outlook users. Professionals recommend to use modern and advanced tool, rather than implementing large method for Outlook Mailbox full issue.

#5 Backup Outlook Entire Mailbox

If you are tired of Outlook Mailbox full even after deleting issues, then the best technique you can use is, downloading the Outlook data and storing it in a safe place. This way you can safeguard your entire Outlook mailbox and can peacefully free up Outlook space. You can use the PST Converter Tool to back up the entire Outlook mailbox at once along with the attachments. Using this software, users can also change the file extension of Outlook mailboxes and store or migrate them anywhere they want.

#6 – Advanced Way to Instantly Solve Outlook Storage Full Error

The manual method “delete large Outlook files” is not an appropriate way to cut down the large-sized PST files. As a result, users face an “Outlook Mailbox Full” error. Now, you need an expert solution like SysTools PST File Compress Tool that provides the best and complete solution to reduce large Outlook mailbox size by dividing them into multiple smaller parts.

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This application supports all Outlook editions and works on all Windows Operating System versions. You can add the ANSI and UNICODE PST files without complications. There are many chances that PST files get corrupted due to a large file; This tool has the ability to split the corrupted Outlook PST file into small files.

Steps to Fix Outlook Mailbox Full Issue – Reduce the PST Size

First of all, Free Download the software from the given download button link. Follow all the instructions that are mentioned below to Outlook storage full after deleting everything:

Step 1. Launch the tool on your machine and click on the Add File(s) and Add Folder option from the top menu.

Step 2. Select attachment options such as Remove Attachments, Compress Attachments, Remove and Save Attachments, and Remove and Compress Attachments in a Folder. 

Step 3. Click on the Browse button and select the Outlook file to fix Outlook storage full error.

Step 4. Choose the categories from Select Items Types.

  Step 5. At last click on the Next button and once the task is over hit on the OK button to complete the task.

Done! This is how you can cut down the large size of your Outlook mailbox in just a few simple steps without any hassle.

Additional Tool Tip

If your PST file is too large and you want to split the large PST file into two parts, then you can try the PST Split Tool. This tool offers you the option to split the large PST file according to users’ choices.

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Why Is It Important to Fix Outlook Mailbox Full Error ASAP?

There are many reasons why is it important to fix the Outlook mailbox full even after deleting everything as soon as possible. Some of them are mentioned below:

• The performance of Outlook becomes slow due to an oversized Outlook data file. After separating a large file into smaller parts, it works smoothly and does not hang up.
• Large Outlook files have many chances for corruption, so, it is better to reduce the size of a large Outlook mailbox to avoid corruption.

Conclusion

Many users face an Outlook mailbox full after Deleting everything errors while manually reducing Outlook mailbox size. To fix the Outlook mailbox full after deleting every error, we provided a simple and reliable solution that helps to break large-size Outlook data files into smaller files. It is compatible to cut the corrupted Outlook PST file without any obstacles. Download the software and start cutting large Outlook data files into several small parts.

Frequent-Asked Questions by Users(FAQs)