yahoo email transition

My emails transitioned.  I can receive emails just fine and have been for several days.  The problem is I cannot send or reply to any emails without getting error messages like: "Edge: too many requests" and not able to sign in to Yahoo account, and connection to yahoo server timed out.  I am using Thunderbird with POP3, Firefox, Win11.  Has anyone else experienced an email send problem like mine?  If I try to contact Yahoo - Support is a paid service and I need to have my credit card ready before I ask a question.    :(