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noptr.spamrats.com
SpamRats NoPTR
SpamRats NoPTR lists IP addresses that are sending email without a proper reverse DNS (PTR) record. Proper PTR records are a basic email authentication requirement.
Tier
Additional
Impact
Low-Medium — Specifically targets missing PTR records, which is a fundamental email configuration issue.
Auto-expiry
Auto-clears once a valid PTR record is configured.
What it lists
IP addresses sending email without valid reverse DNS (PTR) records.
How to get delisted
- 01Check your IP at spamrats.com/lookup.php
- 02Contact your ISP or hosting provider to set up a PTR record for your sending IP
- 03The PTR record should resolve to your mail server's hostname
- 04Ensure forward DNS (A record) matches the PTR record (forward-confirmed reverse DNS)
- 05The listing should clear automatically once a valid PTR record is in place
Open the removal formhttps://spamrats.com/lookup.php