An approach is provided in which a request is received from a requestor to send a new email message to one or more recipients on behalf of a selected joint sender group (JSG). The selected JSG includes multiple JSG members with one of the JSG members being the requestor. Permissions corresponding to the JSG are then retrieved and compared to the requestor and the contents of the new email message are identified. The new email message is then sent to the recipients in response to determining, based on the comparison, that the requestor has permission to send the new email message on behalf of the selected JSG. On the other hand, the sending of the new email message is inhibited in response to determining that the requestor lacks permission to send the new email message on behalf of the selected JSG.