SMTP server issues this AM

smtp authenication errors just starting happening this morning - can’t send emails! Everything working fine - emails being sent and received this morning. Then at 7:32 am EDT - emails stopped being able to be sent - starting getting email alert! SMTP server requires authentication errors. I was just designing word documents and sending them etc. changed nothing on my end - need help in fixing this as this is our main email program for our business!

got it fixed~!