- DNS mirror from MvA Internet Services GmbH Effretikon, Switzerland
- Swinog (Swiss Network Operator Group) for their whitelist data.
- Rediris.es (Spanish Abuse Forum) for contributing their whitelist data.
- Arboris, ISP from Wiltshire, England, contributes their whitelist of UK and other businesses and organisations.
- Eleven, for donating an anti-spam engine for dnswl.org’s mail server
- Red Sift, for donating an account to monitor security aspects of dnswl.org’s infrastructure
…and the many organisations and individuals who provide us with feedback and data.