alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET DELETED Gmail Message Send"; flow:to_server,established; content:"Content-Disposition|3A| form-data|3b| name=|22|to|22|"; nocase; http_header; content:"Content-Disposition|3A| form-data|3b| name=|22|msgbody|22|"; nocase; http_header; classtype:policy-violation; sid:2001426; rev:9; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)