Hi @zefred,
Welcome to Freshworks community. To ensure I address your inquiry accurately, could you please confirm whether you have set up a forwarding rule or if you are using a custom mail server?
If you are using forwarding , Please make sure the long forwarding address of Support email B is used to setup forwarding so that emails sent to Support address B gets forwarded to the long forwarding of B whcih would create a ticket and the group assignment would happen for group B.
Using the long forwarding address of A for Support email B's forwarding rule could result in tickets being assigned to Group A instead of Group B, as the ticket would be routed based on the forwarding address.
I hope this clarifies, please revert back if you have further questions on this.
Regards,
Yusuf Ahmed