alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET POLICY Yahoo Mail Message Send"; flow:to_server,established; content:"/ym/Compose"; http_uri; nocase; classtype:policy-violation; sid:2000044; rev:11; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)