a system and method of hindering an undesirable transmission or receipt of electronic messages within a network of users includes the steps of determining that transmission or receipt of at least one specific electronic message is undesirable ; automatically extracting detection data that permits detection of the at least one specific electronic message or variants thereof ; scanning one or more inbound and / or outbound messages from at least one user for the presence of the at least one specific electronic message or variants thereof ; and taking appropriate action , responsive to the scanning step .