Blogs
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DMARC
How to Read and Act on DMARC Aggregate Reports: A Practical Guide
DMARC aggregate reports tell you which sources send email for your domain and whether authentication checks pass or fail. Here is how to read the data and turn it into action.
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DMARC
DMARC Policies Explained: p=none, p=quarantine, and p=reject
What DMARC policy tags actually do, what changes at each level, and how to move from p=none to p=reject without breaking your legitimate email.
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DMARC
DMARC Alignment: Strict vs. Relaxed Explained
DMARC alignment determines whether your emails pass or fail authentication checks. Strict mode requires an exact domain match. Relaxed mode allows subdomains. Here is what the difference means in practice.
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DMARC
How to Configure DMARC in Microsoft 365 / Exchange Online: A Practical Guide
Step-by-step guide to configuring DMARC for Microsoft 365 and Exchange Online, including DNS setup for SPF, DKIM, and DMARC records, plus how to read aggregate reports to safely tighten your policy.
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DMARC
How to Read DMARC Aggregate Reports: A Practical Field Guide
DMARC aggregate reports arrive as dense XML files that most people never read. This guide explains what the data means, how to interpret the key fields, and what steps to take when your reports show authentication failures.
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Why Third-Party Email Senders Break DMARC Alignment and How to Fix It
Third-party email vendors like Proofpoint and Mimecast can break DMARC alignment even when SPF and DKIM pass. Here is why it happens and how to fix it.
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DMARC
What Email Security Grading Tools Actually Check: The Checklist Behind Your Domain Score
Domain security grading tools evaluate SPF, DKIM, DMARC, and DNS configuration to assign letter grades. Here is exactly what they check and why most domains score in the C-to-F range.
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DMARC
What DMARC Verifies and What It Cannot Detect
DMARC checks whether the sender domain matches your SPF and DKIM setup. It does not scan content, check URLs, or verify attachments.
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DMARC
Why the DMARC np Tag (RFC 9989) Does Not Work Reliably with DNSSEC
The DMARC np tag (RFC 9989) conflicts with DNSSEC in a way that causes silent policy failures. Here is the technical explanation and what to use instead.
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DMARC
Are AI-Powered DMARC Tools a Security Risk?
DMARC reports contain sensitive metadata about your entire sender ecosystem. Sending them to a cloud AI tool means sharing that data with third parties you may not fully control.