Sample · Composite example
Harbor Health
Checked August 21, 2026 at 14:32 UTC · harbor-mail.com
Assets checked
harbor-mail.com · alex@harbor-mail.com · links.harbor-mail.com · 203.0.113.10
Evidence sources
Authoritative DNS answers, HTTPS and TLS endpoints, RDAP registration, public blocklist lookups, and configured sender evidence. Each row keeps its own observed-at time.
18
checks
11
passed
4
warnings
2
blockers
1
unknown
Fix before launch
- DMARC record. Add a DMARC TXT record at _dmarc.harbor-mail.com. Start at p=none, then move to quarantine once reports look clean.
- DKIM selector. Turn on DKIM in your sending tool and publish the key it generates, then re-run to confirm the signature passes.
Mail and DNS
Authentication
Add a DMARC TXT record at _dmarc.harbor-mail.com. Start at p=none, then move to quarantine once reports look clean.
Once the DMARC record exists, raise the policy from p=none to p=quarantine so unauthenticated mail is filtered, not just reported.
Turn on DKIM in your sending tool and publish the key it generates, then re-run to confirm the signature passes.
Website
Serve the root domain over valid HTTPS so it looks legitimate to recipients and filters.
Redirect all HTTP traffic to HTTPS so every visit lands on the secure page.
Risk and sender
Close the gaps: a valid DMARC record and a confirmed DKIM signature both satisfy the Google and Yahoo bulk-sender requirements.
Rerun the history check when the evidence provider recovers. Unknown is not treated as a pass.
This report checks technical infrastructure readiness. It does not guarantee inbox placement.