Can't reply or send message from Yahoo
Cannot reply to or send messages in Yahoo. Attaching screenshots of acct settings. Gmail, Windows 7 Professional, Comodo firewall, Avast free antivirus, latest Thunderbird, HughesNet satellite
Chosen solution
For the outgoing server, change the port to 465, the connection security to SSL/TLS, and the authentication to normal password. If you're using a Yahoo account key or 2-step verification, the password should be an app password.
https://help.yahoo.com/kb/mail-for-desktop/fix-pop-imap-client-sending-receiving-issues-sln3792.html
I don't know if it applies to your version of Avast, but I recommend you disable Mail Shield if it's available.
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Chosen Solution
For the outgoing server, change the port to 465, the connection security to SSL/TLS, and the authentication to normal password. If you're using a Yahoo account key or 2-step verification, the password should be an app password.
https://help.yahoo.com/kb/mail-for-desktop/fix-pop-imap-client-sending-receiving-issues-sln3792.html
I don't know if it applies to your version of Avast, but I recommend you disable Mail Shield if it's available.
Thank you sfhowes. Your solution worked