Welcome to the Make community!
You might want to try using the generic “Email” module. I have an example of this to reply to an existing thread here 📧 Automate Follow-Up of Email Leads a Week After (although it’s for Gmail, but it should work similarly).
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Investing some effort into the Make Academy will save you lots of time and frustration using Make.