Depends on how you'd want to control the access, you could make an account for each email and configure access per account/role, or share the files publicly and

Depends on how you'd want to control the access, you could make an account for each email and configure access per account/role, or share the files publicly and set a password (you can set a different password per user). For more config-based control, there's currently nothing like filtering emails with regex or similar.