Outlook has a default attachment size limit of 20MB for most accounts. However, this limit can vary depending on your Outlook version and email provider.
File size limits in Outlook
- Outlook.com & Office 365: 20MB per email
- Outlook for Business (Exchange Server): 25MB (varies by admin settings)
- Gmail & Yahoo via Outlook: 25MB (enforced by the provider)
How to send larger files in Outlook
If your file exceeds the limit, try these options:
- Use OneDrive: Upload your file and send a shareable link instead.
- Compress files: Use a ZIP file to reduce size.
- Split attachments: Break up large files into multiple emails.
- Third-party services: Use WeTransfer or Google Drive for large files.
Understanding Outlook’s limits helps your emails get delivered without delays or errors.