This Is the blogpost Index Page
Blogs
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DMARC
How to Manage Vendor Email Sending with DMARC Without Losing Enforcement
Vendors that send email from your domain fail DMARC because they lack your SPF and DKIM credentials. Here is how to handle it while keeping enforcement.
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DMARC
How Forwarding Breaks DMARC Alignment and What You Can Do About It
When email gets forwarded, your DMARC check can fail even when SPF and DKIM are correctly configured. Here is why it happens and what you can do about it.
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DMARC
Why DMARC p=none Is Mostly Decorative
Setting p=none tells receiving servers to do nothing when an email fails DMARC. That is not protection. Here is what p=none actually does and why moving to enforcement is the only way to stop spoofing.
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Why Password Resets Do Not Stop OAuth Phishing Attacks
When phishing steals an OAuth token instead of a password, a password reset does nothing. Here is what actually stops an OAuth consent phishing attack.
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SPF
Why SPF Records Suddenly Break and How to Fix Them
SPF records break after infrastructure changes. Here are the six most common causes and how to fix each one.
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Deliverability
How to Clear an IP Address That M365 Still Flags After Internal Delisting
Removing an IP from Microsoft 365's internal spam filter does not clear it from external receivers. Here is why and what to do about it.
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DMARC
What to Do with DMARC Aggregate Report Failures: A Practical Triage Framework
DMARC aggregate reports show failures, but which ones need action and which are normal? This guide walks through a practical triage framework to classify and handle DMARC report failures.
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DMARC
DMARC Monitoring: What to Actually Do With Your Reports
Most email admins enable DMARC monitoring but then ignore the reports. This guide explains what DMARC reports mean, which failures matter, and what to do when problems appear.
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Deliverability
Are PassKey Browser Extensions a Security Risk?
Browser extensions that manage PassKeys can register credentials for any domain without a user's knowledge, creating an account takeover path that bypasses phishing entirely. Here is what practitioners need to know.
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The emailauth.org GCA Root Certificate Is Expiring: What Practitioners Need to Know
The emailauth.org GCA root certificate has expired. If your DMARC reports route through emailauth.org, they have stopped. Here is what to do.