This article on SendGrid is helpful. You do need to set up a separate MX record on a subdomain (or other domain) for inbound "parse" replies.
Drip Email tool compatible with NodeBB
I am currently using NodeBB to run a community forum and now I am looking at integrating a Drip Email tool into the forum.
Are there any recommendations on which tools are the most campatible with NodeBB?
Please find a list of popular drip email tools here.
Looking forward to a positive response!