Allowing a message, composed as an instant message, to be transmitted using an e-mail protocol and displayed at a recipient as an instant message or an e-mail is disclosed. In particular, on a message originator, one embodiment includes, composing a message as an instant message, and transmitting the message using an e-mail protocol. On a message recipient, one embodiment includes, receiving a message in an e-mail protocol, determining whether the message is to be displayed as an instant message, and in the case that the message is to be displayed as an instant message, displaying the message as an instant message at the recipient, otherwise displaying the message as an e-mail at the recipient. Functionality of the originator and recipient sides can be combined into a single client.