Follow this instruction:
Integrating with mailgun is rather easy. Please follow the guide I’ve made. If you still have trouble integrating, I will help you out.
https://instasuite.replytap.io/articles/78171/how-do-i-integrate-my-instasuite-with-mailgun-
To make a successful integration between InstaSuite and MailGun, please follow the instructions below:
2.Click on New Integrations » Choose a name for the integration » Select MailGun as a provider:
You’re all set! Time to send those emails!