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Email authentication
Tools to verify and validate your email authentication setup.
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Email deliverability audit
Audit MX, SPF, DKIM and DMARC to confirm a domain is ready to send.
Mail header analyzer
Decode participants, authentication results and routing from raw headers.
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SPF Flattener
Flatten SPF records to reduce DNS lookups below the 10-lookup limit.
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Auto-discover all DKIM selectors for a domain via DNS brute-force.
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CSR parser
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Page size checker
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Phishing URL Checker
Check if a URL is flagged as phishing or malware by 4 threat intelligence sources.
sumitomomitsuitrust.com · 🇯🇵 JP · industrials
Scan week: 2026-03-02
global
#997 / 1090
country JP
#176 / 225
index nikkei-225
#176 / 225
sector industrials
#304 / 355
Add a DMARC record to protect your domain against spoofing
Add an SPF record to authorize your sending servers
No DKIM key detected for this domain
Deploy MTA-STS to enforce TLS for inbound email
Add a secondary MX for redundancy
Add a TLS-RPT record to receive TLS failure reports
Enable DNSSEC for your domain to improve DNS security
Each company in the Observatory is analyzed weekly for email authentication standards. The audit provides a comprehensive view of the company's email security posture.
What this page shows:
Q: How is the score calculated?
A: Points are awarded for each standard based on configuration quality, totaling up to 100.
Q: What do the grades mean?
A: A+ is excellent (90-100), F indicates significant gaps (below 50).
| Page | Purpose |
|---|---|
| Observatory Dashboard | Overall overview with key metrics |
| Statistics | Cross-index and cross-sector comparison |
| Email Domain Check | Audit your own domain |