Unlocking Your Email Capacity How to See Outlook Mailbox Size

Ready to explore the hidden secrets of Outlook Mailbox Size? Let’s go on an exciting journey! We’ll find out how much content your faithful inbox can contain and unlock its true potential. Also, the steps about how to see Outlook mailbox size from a computer (it can be Windows 11/10 or macOS)

Did you know the average Outlook mailbox has a limit? It varies, depending on your subscription plan or employer’s settings.

Microsoft introduced Outlook in 1997, revolutionizing digital communication. Since then, it’s seen many enhancements and refinements.

We have tips and tricks to help you optimize space utilization. Get ready to unravel the mysteries surrounding your Outlook mailbox size and embrace newfound productivity. Unlock the full potential of your email capacity!

Understanding Outlook Mailbox Size

Comprehending Outlook Mailbox Size is essential. Analyze factors like email content, attachments, and folders contributing to the size.

If you have an Office 365 subscription with your school or work account, your Outlook mailbox size can reach 100GB. But, your administrators can lower this limit as per the organization’s policy.

If you connect the other free or business email hosting services with Outlook, then the mailbox size depends on the settings/limits of the mail hosting provider. 

As you receive and send emails, the mailbox size increases. Monitor and manage the mailbox to optimize performance.

Comprehending Outlook Mailbox Size helps to manage emails. This allows individuals to streamline the communication process and maintain an efficient digital environment.

How to See Outlook Mailbox Size on PC

  1. If you want to see how big your Outlook mailbox is, here’s what to do:
    • Click on File in the top-left corner of the Outlook window.
    • Select Info.
    • After that, click Tools and pick Mailbox Cleanup.
    • In the Mailbox Cleanup window, hit View Mailbox Size to get a detailed breakdown of the size of each folder in your mailbox.
  1. You can also use the Folder Size option to check individual folders and spot those taking up too much space. Knowing the overall mailbox size is useful, but focusing on particular folders can help you see where you need to act.

To do that, right-click on the main email account name and select ‘Data File Properties’. Then click on the ‘Folder Size’ button to see the individual folder size in Outlook. You can have the option to compare it with the local data and server data sizes.

  1. For instance, if your Sent Items folder is much bigger than others, it may be time to delete unnecessary emails or set up automatic archiving.
  2. So, take control of your Outlook mailbox size now. Don’t let it get too full and risk missing important emails or having performance issues.
  3. Check and manage your mailbox regularly for smooth email communication and a flawless workflow.

Managing Your Outlook Mailbox Size

Managing your Outlook mailbox size is essential to stay organized and efficient, as the number of emails received daily is rising. Here are 4 important tips to help you:

  1. Regularly delete emails that are not relevant or not needed anymore. This will free up storage space and simplify finding essential emails.
  2. Instead of keeping all old emails in the main mailbox, archive them. This way, they will be in a separate folder, reducing your mailbox size while still having access to them when needed.
  3. When you delete emails, they go into the deleted items folder. Make sure to empty this folder regularly to completely remove unnecessary emails from your mailbox.
  4. Don’t attach large files directly to emails. Use cloud storage services or file-sharing apps instead. This will decrease the size of emails and improve mailbox capacity.

Furthermore, you can:

  • Set inbox rules that move certain emails to designated folders.
  • Compress file attachments before sending them.
  • Store large files or data on external drives or network locations rather than in Outlook.
  • Compact your mailbox to optimize storage and decrease file size.

Additionally, organizing your mailbox with folders and subfolders makes managing and finding emails simpler.

Fun fact: Microsoft reports that the average user receives 121 emails each day. So, effective mailbox management is important in today’s digital world.


Time to finish off. Conclusions from what we’ve seen? We know how to check the size of Outlook mailboxes. It is really important for managing our email.

Checking size? Yes, we learned two methods. One with the Outlook application and another with the Mailbox Cleanup tool. These give us valuable info and help with issues.

Third-party tools? They have advanced features to monitor and analyze mailbox size. They give a complete understanding of our email storage.

Remember this? Cleaning the mailbox is key to efficiency. Archiving emails and deleting attachments – all this can free up space and improve productivity.

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