Return Path: Resource Center and White Papers for Email Marketers: Beyond Authentication: Keys to Email Delivery Success
Email Accreditation Programs: What Is All the Buzz About?
Email Authentication: Actions you need to take today
UPDATED: Authentication: What We Know Today and What’s Coming Tomorrow http://www.returnpath.net
The Federal Trade Commission’s website contains a summary of a workshop held on authentication: http://www.ftc.gov
AOL Postmaster: Information on AOL’s policies, standards and guidelines relating to email. Information and tools on SPF technology, error messages, feedback loops and white lists: http://postmaster.info.aol.com/