Outbound processing with application firewalls. An outbound message is generated with an application. The outbound message includes at least a trustworthiness indicator and/or marking information for the one or more portions of the outbound message. The outbound message is received by an application firewall. The outbound message is analyzed based on the trustworthiness indicator and/or marking information, and context information. An action is performed on the outbound message based on the trustworthiness indicator and/or marking information, and the context information.