Use PowerShell to Analyze Junk Email and Intercept Traffic from Spammy Domains

Despite the best efforts of anti-spam solutions, some unwanted messages usually get through to user inboxes. This article explains how to analyze messages that end up in Junk Email and use the results to create a transport rule to block future traffic from the spammy domains.

https://practical365.com/analyze-junk-email-block-spammy-domains/