The invention is a more efficient system and method to eliminate undesirable electronic mail (email) communications sent via the Internet. The invention eliminates undesirable email by refusing to accept delivery of the email message thereby minimizing the negative impact of undesirable email while adhering to established Internet protocols and processes guiding email Delivery Status Notifications. The invention does not evaluate or scrutinize 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 invention executes unilaterally and is universally adaptable as it evaluates the TCP/IP and SMTP protocol and transmission data attendant with every email message. The invention 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.