US Patent 10187342 Email privacy enforcement

A system comprises email message parsing circuitry, tracking code suspect analyzer circuitry, reporting circuitry, and message modification circuitry. The email message parsing circuitry is operable to, after reception of an email message via a SMTP connection and prior to the email message being made available in a mailbox of a recipient of the email message, scan the email message to extract a tracking code suspect. The tracking code suspect analyzer circuitry is operable to analyze the tracking code suspect to determine, based on one or more characteristics of the tracking code suspect, whether the tracking code suspect is tracking code. The reporting circuitry is operable to, after a determination that the tracking code suspect is tracking code, generate a report that indicates the presence of tracking code in the email message. The message modification circuitry is operable to replace the tracking code suspect in the email message with replacement content.