yahoo 2 factor PW causes problem sending email - rejected by SMTP server
MY ISP (Frontier) recently move all email over to Yahoo. I made the transition OK with my three email addresses. Things were working fine. My frontier.com addresses were workin great.
Then I followed Yahoo's suggestion that I use 2 factor sign in. I set it up for one address without a problem, except I now find I can receive e-mail but not send email from this address. This is using the Apple mail program.
It says the sender address... was rejected by the server smtp.mail.yahoo.com
I tried turning 2 factor off and it still is the same.
Other two addresses work fine. They currently have two factor off.
I can't winnow out a solution from the discussions I've found so far.
iMac 24″, macOS 13.5