Outlook Email Issue: Daily Sending Limit

I'm experiencing a critical issue with my Outlook. My emails are not sending or receiving. The error message I'm receiving states, "Mailbox has reached daily sending limits for this IP." This is impacting my communication and productivity.

Ideal Skills and Experience:
- Expert in troubleshooting Outlook email issues
- Knowledge of email server configurations and limits
- Experience in resolving email sending and receiving problems
- Excellent communication skills to explain the issue and solution clearly