Methods, systems, and products are disclosed for enabling an exchange of electronic healthcare messages. An electronic message is received from a sender's address that is destined for a recipient's address. The electronic message may have an attached object associated with a sender's legacy system. The sender's address and the recipient's address are associated to a list of health care participant addresses. When both the sender's address and the recipient's address are matched to the list of health care participant addresses, then the electronic message is sent to a rule-based engine. When the sender's address and the recipient's address do not match the list of health care participant addresses, then an identifier is received that associates the electronic message with another legacy system and with a non-participant legacy system.