dnswl.org

Dnswl. org is a leading email whitelist, also known as a DNS whitelist (DNSWL), that helps protect against false positives and ensures that good emails are not wrongly sent to the spam folder. By publishing the outgoing IP addresses of mailservers in different trust levels, Dnswl.

org reduces the risk of false positives and provides reputation information about email senders. Trusted by over 100,000 companies and organizations, the list contains over 600,000 entries of good mailservers, including a growing number of IPv6 entries. Additionally, Dnswl.

org is used by more than 5 million low-volume users daily. With close to 20% of the entries managed by their owners and over 10,000 accounts on their self-service pages, Dnswl. org offers a comprehensive solution for monitoring and managing the reputation of your mailservers.

Access for non-commercial users doing fewer than 100,000 queries per day is free