PTR / reverse DNS

Missing or mismatched PTR is a leading cause of mail landing in spam, and almost nobody checks it. Verifies the full round trip.

ptr.lookup

What it checks

  • The PTR record for an IP address, or for the address a name points to.
  • The round-trip check: whether the PTR name resolves back to the same address (FCrDNS).
  • What the result means for mail delivery and what to ask your provider for.

Hosting that passes every one of these checks

LimaCloud is tuned so your site and mail pass every one of these checks, and we prove it with a benchmark before and after migration.

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