Want to move DMARC to p=reject, worried legit mail will break
DMARC pct=10 starts by blocking 10% of non-conforming mail. You phase up to 100% while reading the reports.
Try this first
- 1Start with p=quarantine pct=10
- 2Read DMARC reports for two weeks, fix each legit source
- 3Scale pct to 25, 50, 100
- 4Then move to p=reject pct=100
When to bring us in
If reports show a source you don't recognise, investigate before scaling further.
See also
- Our emails land in spam for some recipientsAlmost always an SPF, DKIM, or DMARC setting that is wrong or missing, or a sender name that mimics a well-known brand.
- Someone reports receiving phishing emails "from us"Read: spoofing. Someone is abusing your sender name, not necessarily your actual mailbox.
- An email bounces (NDR): delivery failedThe NDR text usually states the exact reason. Reading it is step one.
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