Mac Pro M2 Sound Out.

Troubleshooting Mac Mail:

I. Start Here If you can’t Send or Receive eMail on your Mac - Apple Support

II. Use a New App Password:

Do you use an App Password? If so, try a new App Password. Sometimes, changes (i.e. updates) are made to the device, and then mail server syncing becomes an issue (which is what a new App Password it intended to fix). Go here for gmail: Sign in with App Passwords - Google Account Help - Google

III. Apple Support Links:

• If you can’t Send or Receive eMail on your Mac - Apple Support
• Take eMail Accounts Online or Offline in Mail on Mac - Apple Support
• Verify an eMail Account’s Outgoing Server in Mail on Mac - Apple Support