When I send an email the email is stuck in the sent box with a blue dot next to it. It will not send until I click the it. Any suggestions?

Hey there RoyGarcia,

Thanks for reaching out to Apple Support Communities. I understand sent mail is showing as unread in the sent box and won’t let you finish sending. I’ll be happy to help with this.

Restart your Mac and see if this has any impact on the issue:

How to turn your Mac on or off

If that doesn’t help, see if this occurs in safe boot or a new user account to isolate and possibly resolve this issue:

Use safe mode to isolate issues with your Mac

How to test an issue in another user account on your Mac

The steps in this link may help as well:

If you can’t send emails in Mail on Mac

Let me know if this helps.