FAQ
Server Settings
Yahoo: IMAP / SMTP
Note 1: Yahoo requires an SSL connection, and you must install the SSL plugin if it's not already installed.
Note 2: Yahoo may require OAuth2 login method or you may get an "incorrect username or password" error. See the Yahoo OAuth2 FAQ for more information.
Incoming Mail Settings:
Login Name: Full email address
Password: It is recommended that you use OAuth2 (password is not required in this case)
Server Type: IMAP
Server: imap.mail.yahoo.com
SSL (TLS/SSL is required)
Port: 993 (if using TLS: 143)
Idle: optional
Send Mail Settings:
Reply Option: SMTP
Server: smtp.mail.yahoo.com
SSL required
Port: 465
Server Requires Authentication: Enabled