11. A computerized system for classifying and redacting an email message for distributing to multiple recipients having different security levels, the system comprising: a processor; a non-transitory computer readable storage medium having computer readable instructions stored thereon for execution by the processor, causing the processor to: select a segment of the email message; automatically analyze contents of the selected segment in real time by using an artificial intelligence (AI) system; automatically classify the segment, based on results of the analysis performed by the artificial intelligence system, and in accordance with a set of classification options characterizing a type of information contained in the segment; automatically mark the segment in accordance with a respective classification option to produce a marked segment; automatically classify the email message based on classifications of segments of the email message; and automatically redact the email message in real time in accordance with a respective clearance level of a recipient of the email message, producing a redacted email message, comprising: (i) arranging recipients of the email message in a hierarchy in accordance with respective clearance levels such that a recipient with a higher clearance level occupies a higher level in the hierarchy in comparison to a recipient with a lower clearance level; and (ii) automatically distributing the redacted email message to the recipients of a particular level in the hierarchy concurrently with the redacting marked segments for the recipients at the immediate lower level in the hierarchy.
11. A computerized system for classifying and redacting an email message for distributing to multiple recipients having different security levels, the system comprising: a processor; a non-transitory computer readable storage medium having computer readable instructions stored thereon for execution by the processor, causing the processor to: select a segment of the email message; automatically analyze contents of the selected segment in real time by using an artificial intelligence (AI) system; automatically classify the segment, based on results of the analysis performed by the artificial intelligence system, and in accordance with a set of classification options characterizing a type of information contained in the segment; automatically mark the segment in accordance with a respective classification option to produce a marked segment; automatically classify the email message based on classifications of segments of the email message; and automatically redact the email message in real time in accordance with a respective clearance level of a recipient of the email message, producing a redacted email message, comprising: (i) arranging recipients of the email message in a hierarchy in accordance with respective clearance levels such that a recipient with a higher clearance level occupies a higher level in the hierarchy in comparison to a recipient with a lower clearance level; and (ii) automatically distributing the redacted email message to the recipients of a particular level in the hierarchy concurrently with the redacting marked segments for the recipients at the immediate lower level in the hierarchy. 16. The system of claim 11 , wherein the AI is a decision tree AI system, comprising decision nodes and conclusion nodes, each decision node having outcomes connecting the decision node to another decision node or to the conclusion node.