Yahoo 4xx SMTP Error- How to Fix it Now?
Learn what causes SMTP errors and get some steps for fixing the errors. Review our best practice recommendations if you consistently receive 4xx errors when sending to yahoo. SMTP stand for simple mail transfer protocol used to exchange the emails between the sender’s server and the receiver’s server. But sometimes these servers decline to accept a particular email and send it to the yahoo client. If need any help reach us at Yahoo Live Support at any time.
