Abstract: Disclosed is a system and method to eliminate undesirable electronic mail (email) communications sent via the Internet. The invention eliminates undesirable email prior to delivery of the email message, thereby minimizing the negative impact of undesirable email while adhering to established Internet protocols and processes regarding email Delivery Status Notifications. The system does not require evaluation or scrutiny of the actual contents of an email message, thereby avoiding false positives (blocking of desirable email) and the real or perceived invasion of privacy issues associated with scanning personal and business email communications. The system can execute unilaterally and can be universally adapted as it evaluates the TCP/IP and SMTP protocol and transmission data attendant with every email message. The system operates independently, is not dependant on any third party lists or definitions of spam and does not require any pre or post delivery coordination between senders or recipients.