Rule History

alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg:"ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from|3a|"; nocase; threshold: type threshold, track by_src, count 10, seconds 120; classtype:misc-activity; sid:2000328; rev:12; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)