FCrDNS & Infrastructure Diagnostics
Audit your mail server's foundational identity in real-time. We establish an actual TCP connection to your server to verify Reverse DNS (PTR), validate strict FCrDNS routing, and ensure your live 220 SMTP banner perfectly matches your IP identity for maximum inbox placement.
A properly configured mail server is crucial for inbox placement. We will audit your MX records, verify Reverse DNS (PTR) setup, and check Forward Confirmed reverse DNS (FCrDNS) by matching your SMTP banner to your IP identity.
Email authentication (SPF/DKIM/DMARC) is useless if the server itself looks like a spam bot. Ensure your underlying infrastructure is perfectly configured for maximum reputation.
220 welcome banner. If the hostname in this banner doesn't match your PTR record, strict mail servers will reject your emails.Your feedback has been submitted successfully. We appreciate your help in improving our tools.