Outlook 2013 and yahoo mail

  smudged 19:09 03 Nov 2015

I have just updated to Windows 10 from 8.1 and I replied to an email OK but when I tried to forward an email to my wife's account the email was not sent and since then I have not been able to send email. The email account I am using is Yahoo Mail, not a free one. I have tried resetting the Port numbers for the POP3 and SMPT. Can anybody suggest a solution?

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