A problem, I can write and send e-mails but the person I send them to does not receive the e-mail, even though they is a sent flag, when I send an e-mail .

Yahoo has been telling me my account setting are out of date is that it , or is it my windows 10 is not a genuine program, I had a malware in the system and my local shop just erased my genuine windows and put in a 200 baht copy.

I have had this problem before but it has corrected itself after a few weeks.

I have 2  Yahoo accounts I check by sending e-mail's from one to the other, one did receive e-mails the other, my main account does not, now both accounts do not receive e-mails.

But, I can receive e-mails without any problems from other sauces ie daily junk from Netflix.

Any ideas, please.

Are you sending e-mails from an email program  or  from the webmail  www.mail.yahoo.com   ?