spf Archives - Jean-Christoph von Oertzen

Webinar takeaway – MailFail – Who’s Spoofing Your Email and How Are They Doing It?

jean-christoph — Thu, 27 Jun 2024 18:22:15 +0000

My key takeaways SPF ensures that the SMTP FROM domain explicitly allows the connecting IP address. SPF does NOT ensure that the email address seen by the user is the one which was checked. the existance of SMTP FROM and the From field is a vulnarability: SPF checks SMTP FROM but most mail clients show […]

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Webinar takeaway: Implement DMARC the Right Way to Keep Phishing Attacks Out of Your Inbox

jean-christoph — Thu, 15 Jul 2021 19:10:52 +0000

My key takeaways DMARC uses SPF and/or DKIM In 2021 the National Defense Authorization Act says the Department of Homeland Security (DHS) must implement DMARC US wide there exists an RFC for "email from" SPF = receiving email server checks MAIL FROM address or the domain’s IP address in the HELO handshake against the sender’s […]

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