PTR record (reverse DNS) — what it is

PTR (pointer) is a DNS record mapping an IP address to a domain name. It’s the “reverse” of an A record: A → IP, PTR → IP to domain.

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Why you need it

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• Mail delivery: Gmail and Yahoo mail servers check PTR — if your server IP has no PTR, mail goes to spam
• Security logs: logs show names instead of raw IPs — easier to analyze
• Corporate requirements: some networks won’t accept a server without correct PTR

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The catch

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PTR lives not in your domain’s DNS zone but in a special in-addr.arpa zone owned by the IP owner — i.e. the server provider. You can’t set PTR yourself — you have to ask the provider.

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How to request PTR at Navju Cloud

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If you have a Navju Cloud VPS or dedicated server:

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1. Open a support ticket
2. Provide: server IP and desired name (usually mail.yourdomain.tj or server1.yourdomain.tj)
3. Before requesting, create a regular A record for that name pointing to the same IP — otherwise mail servers will be suspicious
4. PTR will be set up within an hour

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Verification

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dig -x 195.158.10.20 +short\n# or\nhost 195.158.10.20

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It should return your name.