I am receiving DMARC errors

Hello

Please i need your help on this issue.

Last night I started receiving DMARC and other errors when trying to send emails. I dont believe my business email is receiving messages either. 

Please help me 'fix' resolve these bounce back errors.  I did try to find the solution on my own,, but its just out of my wheelhouse.

Please help as my business is being affected by these errors and bounce backs.