Straight from the source: https://help.proofpoint.com/Proofpoint_Essentials/Security_Awareness/Educate/Searchable_Header_in_Mail_Server https://help.proofpoint

Straight from the source: https://help.proofpoint.com/Proofpoint_Essentials/Security_Awareness/Educate/Searchable_Header_in_Mail_Server https://help.proofpoint.com/Proofpoint_Essentials/Security_A... xD The vast majority of security controls are designed for the careless and the clueless.