Blog
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DMARC
Why Email Forwarding Breaks DMARC (And What Happens When ARC Goes Away)
When you forward an email, SPF, DKIM, and DMARC often fail — even for legitimate mail. ARC was the fix. Here's what happens now that ARC is being retired, and what replaces it.
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DMARC
Why DMARC Passes for Forwarded Email But Still Fails Alignment - and What ARC Solves
When email gets forwarded, SPF and DKIM still pass — but DMARC fails. Here's why alignment breaks and how ARC (Authenticated Received Chain) fixes it.
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DKIM
Why Third-Party Vendor Emails Bounce from Microsoft 365 Despite SPF and DKIM Being "Configured"
<p>A third-party vendor says their DKIM is configured for your Microsoft 365 domain but Microsoft still reports missing DKIM signatures. Here is why and what to do about it.</p>
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DMARC
Why Email Forwarding Breaks DMARC (And What Happens When ARC Goes Away)
Forwarding email often breaks SPF, DKIM, and DMARC — even for legitimate mail. ARC was the fix for that. Here's what happens now that ARC is being retired, and what replaces it.
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DMARC
What Happens When You Forget to Re-Add DMARC After Changing Email Providers?
Forgot to restore your DMARC record after an email provider migration? Here's what happens to your email deliverability, and how to recover it fast.
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DKIM
What Is DKIM2 and What Changed in the April 2026 Draft?
DKIM2 replaces the single-signature model that breaks on forwarding with a chain-of-custody system where each intermediate server adds its own signature. Here’s what the April 2026 draft changes and what it means for email operators.
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DMARC
How to Fix SPF, DKIM, and DMARC After Switching Email Providers
Switching email providers without breaking DMARC requires a specific sequence: update SPF first, then DKIM, then DMARC. Here's the step-by-step that prevents email from going dark during a migration.