tutanota.com
Live email deliverability and anti-spoofing audit, read from public DNS. Generated 2026-07-29 06:32 UTC — this page is cached for up to 6 hours, so re-check after changing a record.
92/100 — This domain is configured correctly for both sending and receiving. Accepts mail · Protected against spoofing
Findings
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mx redundancy
Only one mail exchanger is published, so there is no failover.
mail.tutanota.de
Fix: Add a secondary MX at a higher priority number.
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dmarc rua
DMARC has no rua address, so you receive no aggregate reports and are flying blind.
v=DMARC1; p=quarantine; adkim=s
Fix: Add rua=mailto:dmarc@tutanota.com to the record.
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mx
1 mail exchanger published.
0 mail.tutanota.de
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spf
SPF is published and enforcing.
v=spf1 include:spf.tutanota.de -all
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dmarc
DMARC is enforcing with p=quarantine.
v=DMARC1; p=quarantine; adkim=s
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dkim
DKIM keys found for 2 selectors.
s1._domainkey, s2._domainkey
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mta sts
MTA-STS is published, so senders will refuse to downgrade to plaintext SMTP.
v=STSv1; id=20190723;
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tls rpt
TLS reporting is enabled.
v=TLSRPTv1;rua=mailto:mta-sts-reports@tutanota.com
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dnssec
DNSSEC is validating, so these records cannot be silently tampered with in transit.
AD flag set
Records
| MX | 0 mail.tutanota.de |
|---|---|
| SPF | v=spf1 include:spf.tutanota.de -all |
| DMARC | v=DMARC1; p=quarantine; adkim=s |
| DKIM selectors | s1, s2 |
| MTA-STS | published |
| TLS-RPT | published |
| BIMI | not published |
| DNSSEC | validating |
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Swap /badge/ for /badge/dmarc/, /badge/spf/,
/badge/dkim/ or /badge/spoofable/ for a specific check.
Add ?style=plastic if you prefer the gradient.
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curl "https://mailgrade.dev/v1/domain?domain=tutanota.com"
Also available: /v1/verify?email=… for individual addresses, and
/v1/verify/batch for lists.