Using New Outlook on Windows for professional communication and productivity
Welcome to Microsoft Q&A
Hello @Clifden Mckenna ,
The exact limit depends on the type of Outlook account you're using.
Since your message was sent to only 34 contacts, the error may indicate one of the following:
- Your account has already reached its daily sending quota from earlier messages.
- Your account is new and subject to temporary lower limits.
- Microsoft has temporarily restricted sending activity based on account reputation or unusual activity.
To help increase sending limits and improve account reputation, Microsoft recommends:
- Keeping your account information and security details up to date.
- Adding recipients to your Contacts.
- Using Microsoft Authenticator.
- Waiting for the 24-hour restriction period to expire if you've reached a quota threshold.
Could you let us know whether you're using:
- A personal Outlook.com account, or
- A Microsoft 365 work/school account?
Reference
- Sending limits in Outlook.com Sending limits
If my answer helped you resolve your issue, please consider marking it as the correct answer. This helps others in the community find similar solutions.