When your mailbox is full, you can't send or receive email. How to check your space and free it up fast.
Your work mailbox has a size limit. As it fills up, Outlook warns you that your storage is almost full. If it goes over, you can't send or receive email, and people who email you get an error.
Check how much space you're using
- New Outlook and Outlook on the web: Settings > Accounts > Storage shows how much each folder uses.
- Classic Outlook: File > Tools > Mailbox Cleanup.
Free up space fast
- Empty Deleted Items and Junk Email. Deleted email still counts until you empty the folder.
- Find the biggest emails. Sort a folder by Size, and delete large emails you don't need.
- Save attachments to OneDrive, then delete the email. Share links instead of attaching big files in future.
- Clear out Sent Items, which often holds years of attachments.
Need to keep everything? Ask us about an online archive, which can give you more space without deleting anything.
