MxToolbox Best Practices - DMARC Policy

From Sarah Kelly <sarah@mxtoolbox.com>

Sarah Kelly sarah@mxtoolbox.com 2026-07-16 18:12:52

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Hi!

As a new user of MxToolbox.com, I'm sure you're interested in email delivery issues, so I've enrolled you in our newsletter on Email Best Practices. I hope you enjoy them!

Thanks,

Sarah

Getting DMARC to Reject

You set up DMARC months ago. You're sitting at p=none, the reports look fine, and you've moved on. The uncomfortable truth: until you reach p=reject at 100%, Google and Microsoft treat your mail as suspect by default. Here's the iterative path to reject that won't break a single legitimate sender along the way.

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