Response Detection Won’t Work with Yahoo Mail

Yahoo Mail inbox requires a few additional steps to set up. Essentially, Yahoo marks any app trying to connect to a Yahoo Mail account that is not the official Yahoo Mail app as “less secure”.

FollowUpThen users who wish to use response detection with a Yahoo Mail have two options:

  • Turn on the “allow less secure apps” option
  • If you do not wish to allow the less secure apps option, you can turn on two-factor authentication, and then use an application-specific password to authenticate

Turning on “Allow less secure apps” option

  1. Sign in to Yahoo Mail.
  2. Go to your “Account security” settings.
  3. Turn on Allow apps that use less secure sign in.
  4. Go to and connect your Yahoo account

Enabling two-step verification

  1. Sign in and go to your Account security page.
  2. Next to Two-step verification, click the toggle button to enable click the on-Off icon in the two-step verification process. .
  3. Enter your mobile number.
  4. Click Send SMS to receive a text message with a code or Call me to receive a phone call.
  5. Enter the verification code | click Verify.
  6. Click Create app password to reconnect your apps. See the section below for more info.
  7. Select Other from the dropdown list.
  8. Enter the name FollowUpThen in the app name.
  9. The next screen will provide a custom password used only to connect FollowUpThen to your Yahoo account. Copy the password.
  10. Return to and click connect next to your Yahoo account.
  11. Paste the password into the password field instead of your usual Yahoo password and click submit.

This is a known issue with Yahoo Mail.

If you have any difficulty setting this up, please contact us at for further assistance.