Abstract: A computer-implemented method of unsubscribing a recipient of an electronic message may comprise identifying and extracting an unsubscribe Universal Resource Indicator (URI) from the electronic message and carrying out a dynamic unsubscribe scenario if the extracted unsubscribe URI matches a known unsubscribe URI. The dynamic unsubscribe scenario may comprise instructions that are selectively executed depending on contents of a single unsubscribe form in a webpage pointed to by the extracted unsubscribe URI. These instructions may comprise finding and filling in a single input field in the webpage that is relevant to unsubscribing with an electronic address of the recipient or finding and updating a user interface element that is relevant to unsubscribing. The single unsubscribe form with the filled in single relevant input field or updated user interface element may then be submitted and a determination may be made whether an unsubscribe confirmation message was generated.

Abstract: A method of determining a probability that a received email comprises a phishing attempt may comprise analyzing a link therein to determine whether the link comprises a phishing attempt. This determination may comprise comparing features of the link with records stored in a remote database to determine whether the link comprises a phishing attempt. It may be determined that the link comprises a phishing attempt if there is a match. If the compared features do not match the records stored in the remote database, a multi-dimensional input vector may be built from features of the link, which input vector may then be input into a phishing probability engine. The probability that the link comprises a phishing attempt may be computed by the phishing probability engine. Thereafter, the received email may be acted upon according to the computed probability that the link comprises a phishing attempt.