Methods, systems, and products systems are disclosed for categorizing and converting an attached object. An electronic message is received from a sender's address that is destined for a recipient's address and has the attached object associated with a sender legacy system. The sender's address and the recipient's address are associated to a list of addresses. When both the sender's address and the recipient's address are matched to the list of addresses, then the electronic message is sent to a rule-based engine that interprets the attached object using a set of rules and that categorizes the attached object. The object is converted based on the category. When the sender's address and the recipient's address do not match the list of addresses, then an identifier is received that associates the electronic message with another system.