Hi @Jeff L. Annas
Good day! Welcome to Q&A forum.
Before I can help you with the issue, could you please answer the following question: Which application are you using to send emails?
Assuming you are using the Outlook desktop application, let's try performing a reinstallation. Close Outlook completely: Open your "Applications" folder > Move Microsoft Outlook to the Trash > reinstall Outlook from this link: Update history for Office for Mac - Office release notes | Microsoft Learn