A computerized method for message processing, comprising: generating a simulated phishing message for use in a simulation platform, the message comprising an identifierin the message or in metadata of the message, wherein the simulated phishing message is a non-malicious message that resembles a phishing attack, and wherein the identifieris unique or substantially unique for each simulated phishing attack and is encrypted or encoded by the simulation platform; receiving a notification triggered by a user action by an individual that a message delivered in an account associated with the individual has been identified by the individual as a possible phishing attack; providing computer-executable instructions for a messaging client, the computer-executable instructions configurable for determining whetherthe delivered message is a known simulated phishing attack based on the encrypted orencoded identifier of the delivered message; when the delivered message is determined notto be a known simulated phishing attack based on the encrypted orencoded identifier, then: receiving the delivered message at the simulation platform; processing the delivered message at the simulation platform according to a set of electronically stored rules to determine whether the delivered message or attachment data of the delivered message contains defined textual or binary patterns associated with a threat; associating the delivered message with a message cluster (950, 960, 970) based on the processing according to the rules, the message cluster (950, 960, 970) being defined as a group of messages having at least one characteristic in common with the delivered message; and displaying a graphical representation of the message cluster(950, 960, 970), each of the group of messages displayed having been determined not to be a known simulated phishing attack. generating a simulated phishing message for use in a simulation platform, the message comprising an identifierin the message or in metadata of the message, wherein the simulated phishing message is a non-malicious message that resembles a phishing attack, and wherein the identifieris unique or substantially unique for each simulated phishing attack and is encrypted or encoded by the simulation platform; receiving a notification triggered by a user action by an individual that a message delivered in an account associated with the individual has been identified by the individual as a possible phishing attack; providing computer-executable instructions for a messaging client, the computer-executable instructions configurable for determining whetherthe delivered message is a known simulated phishing attack based on the encrypted orencoded identifier of the delivered message; when the delivered message is determined notto be a known simulated phishing attack based on the encrypted orencoded identifier, then: receiving the delivered message at the simulation platform; processing the delivered message at the simulation platform according to a set of electronically stored rules to determine whether the delivered message or attachment data of the delivered message contains defined textual or binary patterns associated with a threat; associating the delivered message with a message cluster (950, 960, 970) based on the processing according to the rules, the message cluster (950, 960, 970) being defined as a group of messages having at least one characteristic in common with the delivered message; and displaying a graphical representation of the message cluster(950, 960, 970), each of the group of messages displayed having been determined not to be a known simulated phishing attack.