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DNS
PTR records

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Authentication
DNS
Reputation
Warmup
Deliverability
Inbox Placement

PTR records

Pointer records used for reverse DNS lookups of IP addresses.

Reading time:: 5 min
Difficulty:: Intermediate
Estimated duration:: 5 min
Prerequisites:: DNS
Last updated:: 2026-07-15
Author:: empire

Definition

PTR records map addresses to names in reverse-mapping zones.

Prerequisites

DNSDomain Name System — the lookup fabric email authentication depends on.

DNSDomain Name System — the lookup fabric email authentication depends on.

Open step-by-step: Configure reverse DNSAlign PTR and HELO/EHLO for each sending IP before warmup or production volume.

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