Blacklist wiki · Retired
SORBS Dynamic IP List
The SORBS DUL lists dynamic or residential IP addresses that should not be directly sending email. If you're on a home internet connection or a VPS with dynamic addressing, you may appear here.
- Zone
- Widely used
- Tier
- Author
At a glance
- Zone
- dul.dnsbl.sorbs.net
- Tier
- Widely used. Referenced by many corporate filters and ISPs, usually as one signal among several. A listing costs you some recipients, and a scan reports it as a warning.
- What it lists
- Dynamic, residential, or improperly configured IP addresses sending email directly.
- Impact
- Medium: primarily affects senders using residential or dynamic IP addresses.
- How to check
- Nothing to check: the zone no longer answers queries.
- How to delist
- No need: a list that has shut down holds no listings.
- Auto-expiry
- Does not auto-expire. Requires proper PTR configuration and manual removal.
How to get delisted
Kept for reference: this list no longer operates.
- 01Check your IP on the SORBS website
- 02Set up a proper reverse DNS (PTR) record for your sending IP
- 03Ensure your IP has a static assignment from your ISP
- 04Submit a delisting request showing your PTR record is configured
- 05If you're on a residential connection, use your ISP's SMTP relay instead