How to Increase Outlook Mailbox Size Without Deleting Emails

MS Outlook is a popular email client for both Windows and Mac users. However, when your Outlook mailbox starts running out of space, it can significantly impact your productivity. But there’s no need to delete essential emails to resolve this problem. If you’re looking to increase the size of Outlook mailbox without losing valuable emails, you’re in the right place. 

In this blog, we’ll show you effective methods to free up space and take advantage of powerful features like archiving and cloud storage. Moreover, we’ll introduce the DRS Softech PST Recovery Tool as a reliable and hassle-free solution for managing mailbox issues.

Why Does Your Outlook Mailbox Reach Its Limit?

Your Outlook mailbox can quickly reach its storage limits due to the collection of data over time. Here are the key reasons why this happens:

• Files like photos and documents, which are often sent and received via email, can take up a lot of space. 
• Old emails pile up in your inbox, especially those that are left unchecked. 
• Outlook’s PST file has a size limit (2GB for older versions, 50GB for newer ones).
• Deleted emails remain in the “Deleted Items” folder, continuing to take up space.
• Corruption can cause abnormal data buildup and affect mailbox size.

Top Methods to Increase the Size of Outlook Mailbox

If your Outlook mailbox is full, there are several effective ways to increase its capacity without losing important emails. Below are some of the best methods to help you efficiently manage and expand your mailbox size. You can use the manual and the recommended tool to ensure smooth performance while keeping your valuable messages intact.

Method 1: How to Increase Outlook Mailbox Size From Registry

Increasing the Outlook mailbox size through the registry is mainly for older versions of Outlook (such as Outlook 2007, 2010, etc.). It allows you to adjust the maximum size of your PST files. However, this method should be used with caution, as incorrect registry modifications can cause system issues.

Here are the steps to increase the size of Outlook mailbox:

1. Firstly, open Registry and, press Win+R, type Regedit >>Enter.
2. Before making any changes, back up your registry by clicking on File > Export and saving a copy of the registry.
3. In the registry editor: HKEY_CURRENT_USER\Software\Microsoft\Office\<version>\Outlook\PST.
4. Replace <version> with the version of Outlook you’re using: For Outlook 2010: 14.0, For Outlook 2013: 15.0, For Outlook 2016: 16.0.
5. Now, Right-click on the right side of the window, select New > DWORD (32-bit) Value, and name it MaxLargeFileSize.
6. Similarly, create another DWORD (32-bit) Value named WarnLargeFileSize.
7. Finally, enter 71680 value data, close the registry, and restart Outlook for the changes to take effect.

Method 2: Archive Old Emails to Increase the Size of Outlook Mailbox

1. Firstly, click on File and select Options.
2. Select Advanced >> AutoArchive Settings.
3. Set up how often Outlook should archive items.
4. Choose where the archived emails should be saved.
5. In the end, click OK to save the changes.

Risks of Manually Adjusting Outlook Mailbox Size

• The registry method is mostly limited to older Outlook versions and may not work for newer versions.
• Incorrectly modifying the registry can lead to system errors and application crashes.
• It requires technical expertise and doesn’t automatically manage or optimize mailbox size.
• Also, it increases the risk of PST file corruption or data loss while performing the manual method.

Method 3: Effective Solution to Increase the Size of Outlook Mailbox

Another effective way to manage and increase your Outlook mailbox size is using a PST Recovery Tool. This method is useful for users dealing with large or corrupted PST files. Additionally, it can help you recover lost data and optimize your mailbox for better performance, ultimately increasing its storage capacity. 

How the PST Recovery Tool Works:

1. Download and run the PST Recovery Tool on your PC.
2. Click on Open to add a PST file and check the path of PST.
3. Now, choose the Recovery Setting and optional features >> OK.
4. Preview and select the added PST file and click Save.
5. Then, select the folder path to save the resultant file.
6. Apply advanced features based on your requirements.
7. Lastly, click on OK to initiate the process.

Exclusive Features of PST Recovery Tool:

• It provides complete recovery of mailbox data from a highly corrupted PST file.
• Ability to save recovered PST files in multiple formats like EML, DBX, etc.
• Allow users to preview the content of the recovered PST file before saving it.
• Features to use different recovery modes to repair any level of corruption.
• It has a simple interface, which makes it easy to operate the process.
• Also, use the date range filter to restore only necessary mailbox data.
• Highly compatible with all the earlier and latest versions of MS Outlook.

Conclusion

Expanding the size of your Outlook mailbox is essential for maintaining smooth email operations and preventing slowdowns or data loss. Whether you choose manual methods, such as archiving old emails or modifying registry settings, or a recommended tool. Each approach offers reliable ways to increase the size of Outlook mailbox and optimize your mailbox. Moreover, if the PST gets corrupted due to the oversize, you can easily restore them using the recommended tool.

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