I unable to send yahoo email but can receive email after updated ios 11.1.1

My yahoo mail seems not workable after updated new version iOS 11.1.1

I unable to send any email but I can received all the email.

The error message shown” Cannot send email, the username & password for yahoo is incorrect”.

I’ve deleted the email account in setting and re-setup again my yahoo mail but still unable to send out any mail.

Anyone facing same issue? Please advise.