{"domain":"notion.so","timestamp":"2026-08-25T16:44:04.657Z","check":"fcrdns","description":"Forward-confirmed reverse DNS for mail-server IPs","result":{"checked":false,"results":[],"issues":["No MX records to check"]},"citationUrl":"https://intodns.ai/citations/what-is-fcrdns-ptr-record-email-deliverability","apiUrl":"https://intodns.ai/api/email/fcrdns?domain=notion.so"}