A DMARC record can disappear or change without anyone noticing, because nothing visibly breaks. The first sign is often email landing in spam or someone sending in your name.
The record is only read by receiving servers. Your own email keeps working, so there is no error on your side when it is gone.
A DNS migration that did not copy the record, an edit that replaced the whole text, or a provider that tidied up old records. A mistyped policy can also make it invalid.
Look up the TXT record at _dmarc.yourdomain and read it. No answer means no record, and a record without a p= policy is not valid.
Compare the record with the last version you know. A regular check shows a removal while it is still easy to fix.
Domain Night Watch alerts you when the DMARC record of a domain changes or is removed. Open Domain Night Watch
Domain Night Watch is in testing.
Last reviewed: 2026-11-02
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This page gives general information and is not legal, financial or medical advice. [email protected]