Email security

SPF avoids the deprecated ptr mechanism

SPF, DMARC, DKIM, MTA-STS: protection against spoofed mail in your name.

Why it matters

The ptr mechanism is deprecated and some receivers ignore it, so the senders it describes may fail SPF.

How to fix it

Quick fix · under 1 hour

Replace ptr with ip4:/ip6: ranges or include: mechanisms.

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How we test it

The check runs from the public internet as part of every scan, read-only and without touching your data. If it fails, your report shows the evidence that proves it - the record, header, file or banner we observed - together with the fix above, tailored to the issue we found.

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