Autoresponder for mail groups?

Autoresponder for mail groups?

Dear community,

we have problems setting up autoresponders for specific mail addresses (groups). The following situation exists:

- An email group info@ourdomain.com exists (that works).
- In this group 4 users with indivdual mail adresses (with administrator rights) exist
- The associated users can receive and reply to messages received through this group mail " info@ourdomain.com" ... from "outside" the business (all users)

However, we would like to set an autoresponder as soon as an external user is sending a mail to the " info@ourdomain.com" address.
- We can set up individual autorepsonders for the 4 group members (they work if the members are directly contacted through their mail addresses). But the autoresponder does not trigger if a mail is received through the "info" group mail.

How can we setup an immediate autoresponse for every mail (external and internal) received through our group mail "info@ourdomain.com"?

Thanks a lot for our help and support.

Chris.