The DNS side looked complete: a DKIM public-key record (1024-bit RSA) published at default._domainkey, SPF passing, DMARC configured. But a seed test sent October 23 from
eva@permitintelbrief.com told the truth in its headers:
spf=pass, dmarc=pass — and no dkim result at all. No DKIM-Signature header existed anywhere in the message, and the copy in the Sent folder was independently marked "DKIM: none." The provider's outbound server simply wasn't signing.
Why dashboards missed it: the 100/100 health score came from a checker that inspects records, not signatures — a published key is not a signed message. The sending platform's own audit did flag "DKIM not verified" across six consecutive daily readings, and warm-up scores plateaued in the 60s while it stayed broken.
Fix applied: after the provider's support confirmed the test message was unsigned and prescribed the remedy, the domain's DMARC configuration was deleted and re-set-up in the provider panel on October 26, which re-armed signing.
Proof: a test send that morning (07:10 CDT) arrived with a DKIM-Signature header present and Gmail Authentication-Results reading
dkim=pass (
header.i=@permitintelbrief.com, header.s=default),
spf=pass, dmarc=pass.