Michael Hammer

Michael Hammer

Joined on July 28, 2007
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Featured Blogs

Interoperability Testing Event for DMARC Email Anti-Spoofing Specification

At the end of January, the DMARC (Domain-based Message Authentication, Reporting & Conformance) specification was publicly announced and resulted in widespread media coverage, blog posts and discussion. Since that time various individuals and organizations have been working on writing code for DMARC validators and report parsers. The dmarc-discuss list has been fairly active as various questions and issues have been raised and clarified. Now it is time to see how well the various implementations play together in live testing. more

BP and Incident Response: How Well Do Oil and Security Mix?

BP and the Oil Industry are taking a lot of heat these days - much of it rightly so. Moving beyond the drama and evaluating the overall response of BP and others reinforces much of what is taught in incident response training and preparation... by showing the outcomes when one does not respond well. This is probably the most important incident that the responders involved will deal with in their professional lives. For those of us working to protect Internet Infrastructure and resources there are useful lessons as we consider what is happening in the Gulf of Mexico and their response effort. more

A Few Thoughts on the Future of Email Authentication

With the Online Trust Alliance Town Hall Meeting and Email Authentication Roundtable next week as well as the RSA Conference, I decided to pause and think about where we are and where we might be headed with regard to email authentication. Over the years, many of us have collectively worked to provide a framework for authenticating email... more

Warning, Danger Lurks Here: Exploring DKIM/ADSP Edge Cases - Missing message-id

This article is the first in an occasional series on DKIM/ADSP edge cases that may not be generally recognized or understood. Many people advocate DKIM/ADSP adoption without fully recognizing potential implementation and operational issues. The fact is that the email messaging environment is fraught with opportunities for poor outcomes because of common practices that need to be considered or poorly understood implementations that are not considered... more