Users of a message management service can collaborate to draft a message to a designated recipient. One user can create a draft message and identify one or more other users to collaborate on the draft. The users become authors of the draft, and the draft becomes available to each user through a drafts folder maintained for that user by the service. The users can each edit the draft. The message management service can send the draft as a message to the recipient when one or more of the collaborating users indicates that the draft should be sent. The message can include an indication that it is a collaborative message from all of the authors.