This n8n workflow automates the process of monitoring critical domains and IP addresses against popular blacklists to protect email deliverability and sender reputation. It uses a scheduled trigger to regularly check defined assets (domains and IPs) via an API like AbuseIPDB. If any asset is found to be blacklisted with a high confidence score, an urgent Slack notification is sent to alert the relevant team for immediate action. The workflow features nodes for defining monitored assets, querying the blacklist API, conditional logic to assess risk, and Slack integration for alerts. Ideal for system administrators, security teams, and marketers, this automation ensures proactive blacklisting detection and rapid response, minimizing email deliverability issues and reputational damage.