An autonomous email-report composer composes a type of report on cyber threats that is composed in a human-readable format with natural language prose, terminology, and level of detail on the cyber threats aimed at a target audience. The autonomous email-report composer cooperates with libraries with prewritten text templates with i) standard pre-written sentences written in the natural language prose and ii) prewritten text templates with fillable blanks that are populated with data for the cyber threats specific for a current report being composed, where a template for the type of report contains two or more sections in that template. Each section having different standard pre-written sentences written in the natural language prose.