1. A method comprising: generating a collaborative email document comprising metadata identifying collaborators and an administrator of the collaborative email document and an email body having editable email message text, wherein the collaborative email document identifies signatories to the collaborative email document; providing editable copies to the collaborators of the collaborative email document for viewing and editing the editable email message text of the collaborative email document, wherein the editable copies reside on devices of the collaborators; updating the editable copies of the collaborative email document on the devices of the collaborators with revisions of the editable email message text from the collaborators, wherein the updating the editable email message text occurs synchronously through an instant messaging protocol as the revisions are made, and wherein the instant messaging protocol is provided by a server generating the collaborative email document; sending the collaborative email document with the revisions from a device of the administrator to an addressee in response to determining that the collaborative email document is digitally signed by each of the signatories; and alerting the signatories to sign the collaborative email document through the instant messaging protocol.