If you've set up the Mailgun and Prospect Reach email account integration successfully and the replies aren't showing up in your Prospect Reach inbox, there's a high chance that the reply tracking features in your Mailgun account are off.

Here are some steps to set it up:

- In your Mailgun Control Panel, click on Sending on the left of the screen.

Select your domain name.

- Click on Domain Settings.

- Then turn on both the Open tracking and Click Tracking if they're both turned off:

Try to test the reply tracking in Prospect Reach after that.