Mail won't send to a Yahoo.com address-goes to Outbox

My wife's MBPro with Big Sur Mail 14.0 will not let her send to friend with yahoo.com email address--message goes to Outbox and will not send when Opened (Apple-O) and sent--Mail sends all other emails right away--I can send easily to that friend's yahoo address--ideas?

MacBook Pro

Posted on Aug 11, 2021 6:58 AM

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Mail won't send to a Yahoo.com address-goes to Outbox

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