MailTester NinjaA DMARC record tells receivers what to do when a message fails SPF and DKIM alignment, and where to send reports. This checker reads your _dmarc record, shows the enforcement policy (p=none, quarantine or reject) and whether aggregate reporting is on. Gmail and Yahoo now require DMARC for bulk senders.
_dmarc.yourdomain starting with v=DMARC1. It sets a policy for messages that fail authentication and requests reports.p=none only monitors; quarantine sends failures to spam; reject blocks them outright. Start at none with reporting, then tighten to reject once your legitimate mail passes.p=none DMARC record with aligned SPF or DKIM, or their mail is rejected or spam-foldered.Want the complete picture? The Deliverability Radar scores a domain or IP out of 100 across DNS, authentication, reputation and connectivity, and emails you a branded PDF.
More free tools: SPF Checker · DKIM Checker · MX Lookup · Reverse DNS Lookup · MTA-STS Checker · Blocklist Checker · DNS Lookup · Blocklist Checker