Domain Security Basics: Configuring DMARC for Email
June 9, 2026 — Paul McDowell
DMARC (Domain-based Message Authentication, Reporting, and Conformance) is an email authentication protocol that allows domain owners to specify how email receivers should handle messages that fail SPF and DKIM checks. It provides a protocol for reporting, handling, and enforcing policies based on the alleged origin domain's preferences. This is part of the "Domain Security Basics" collection of articles, designed to help domain custodians by arming them with the knowledge and skills necessary to achieve their first level baseline of security and make life harder for attackers.
Domain Security Basics: Correctly Configuring SPF for Email
May 21, 2026 — Paul McDowell
Correctly configuring domain security features like SPF, DMARC, and DKIM is no longer optional, they're mandatory steps to protect your business, employees, clients, and your reputation. This article provides a deep dive on SPF security, what the fields mean, and how to properly read and compose your own records. This is part of our "Domain Security Basics" collection of articles, designed to help protect you by arming you with the knowledge and skills necessary to achieve your first level baseline of security and make life harder for attackers.