DKIMWatch

DKIMWatch is a web app that continuously monitors DKIM signing health across your domains and sending sources, then tells you exactly what broke and how to fix it. It checks DNS records, selector coverage, key length/rotation status, alignment with From domains, and real-world message samples (via seed inboxes or SMTP capture) to verify signatures actually validate in the wild. When a vendor changes a selector, a DNS record gets truncated, or a key expires/rotates incorrectly, DKIMWatch alerts the right people with a plain-English root cause and a copy-paste DNS patch. It also produces audit-friendly reports for security and compliance teams, plus a “blast radius” view showing which products (ESP, CRM, helpdesk) are impacted. This is not an ESP replacement; it’s the missing monitoring layer that most teams only realize they need after a deliverability incident.