The Garden

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• Real mail from Gmail: why did the forward rule skip it? 🌱 seedling · EN · VI
  A mail-forwarding rule only let through mail that passed DMARC. For almost 11 days, DMARC-passing mail from Gmail, Outlook or any p=none domain got stuck, because the rule looked for the words dmarc=none and found them inside other words. It was the second time this trap closed in the same place. Here is why, how it was fixed, and how to search your own code for it.