Running diagnostic
Running your DNS diagnostic…
Checking SPF, DMARC, DKIM, MX, DNS, blacklists and domain & SSL expiry. A domain we haven't scanned before takes a few seconds — hang tight.
Checking SPF, DMARC, DKIM, MX, DNS, blacklists and domain & SSL expiry. A domain we haven't scanned before takes a few seconds — hang tight.
Scanned Jul 20, 2026 23:04 UTC · 7 checks · public report
Solid base — two policy steps remain.
nasa.gov publishes an enforcing DMARC policy, so mail that forges its domain is quarantined or rejected at the recipient.
v=spf1 include:_spf-4a.nasa.gov include:_spf-4b.nasa.gov include:_spf-4c.nasa.gov include:_spf-4d.nasa.gov include:_spf-4g.nasa.gov include:_spf-4m.nasa.gov include:_spf-4x.nasa.gov include:_spf-6a.nasa.gov include:spf.protection.outlook.com -allThis means your email signature key is smaller than recommended, so it is easier to break than a modern one. If an attacker can forge that signature, your messages may be more likely to be spoofed or tampered with. The fix is to replace this DKIM selector with a stronger, modern key size and then update the DNS entry for that selector.
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