We have G Suite (Gmail) email, and we have the same question every day. We thought about Automatic Replies to emails that came with certain words.
We are looking for an (even paid) service (which is not Outlook) that will check if an email (subject+body) contains certain words and will be auto replied with a specific email to those words.
For example: a mail having the words "world" and "cup", will be sent an auto reply email with "Welcome to the football team" in the subject. Or for example: If you send "Package" and "Delivered", the sender will receive a "Thank you" email.
I've checked Freshdesk and automate.io but they didn't really meet our expectations.