share an icloud email with different apple ids

I'm working with 3 other people, and we use Mail for Mac (all have different Apple IDs) and all have access to 3 different email accounts hosted through our domain. We're looking for a solution for archiving emails in order to keep our inbox under control. Smart boxes don't work because they don't show up on the different devices (computers/phones etc). Is it possible that we could set up and share an iCloud email address that all would be able to access? We'd basically be using it as a place to store/archive our emails. Is this possible? Or are there any other solutions out there? Thanks in advance!!