Blacklist wiki · Additional
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.
- Zone
- Additional
- Tier
- Author
At a glance
- Zone
- noptr.spamrats.com
- Tier
- Additional. Smaller or specialist lists with a narrower reach. Lower impact on its own, but worth clearing; a scan reports a listing here as information.
- What it lists
- IP addresses sending email without valid reverse DNS (PTR) records.
- Impact
- Low-Medium: specifically targets missing PTR records, which is a fundamental email configuration issue.
- How to check
- Look your IP up on the operator's own site. It refuses queries sent through public resolvers, so a free checker may not see it.
- How to delist
- 5 steps below, ending on the list's removal page.
- Auto-expiry
- Auto-clears once a valid PTR record is configured.
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