Emails are not delivering

I have installed the plugin and added myself as user from incognito mode. The user added and I got it listed in affiliates link also. But none of the email has been delivered to my email id.
We use Post SMTP plugin and we have all logs of emails delivering status. Do I need to buy or use any add-on to deliver emails from WP Affiliate plugin? What additional setup I have to made to get emails delivered?

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