Intention data is used to determine an intent of a sender of a message, or other participant, in an electronic communication system such as an email system. For example, a message that is designated for sending can be compared to the sender's intention data and if a discrepancy or deficiency is detected between the sender's determined intent and the actual message then an action is taken such as providing an alert to the sender or to another person, process or device; requiring an action by the sender such as confirming the message, making an edit, checking information, etc.