All Reolink NVRs and Cameras.
If you use Yahoo Mail, then choose Yahoo in Email Server (SMTP Server), or input the following information:
Server name: smtp.mail.yahoo.com
SSL or TLS: ON
You also need to turn on Allow apps that use less secure sign in following these steps:
Step 1. Log into Yahoo mailbox and go to your "Account security" settings.
Step 2. Choose “Account security” and turn on the button of “Allow apps that use less secure sign in”.