BSI email check
https://www.bsi.bund.de/dok/E-Mail-Checker
Dataset | EmailThe BSI report scores free email providers based on their security measures they implement.
Protection for the sending address:
- SPF
- DKIM
- DMARC
Measures for confidentiality and integrity:
- DNSSEC
- DANE
- TLS version
Other measures:
- Disable insecure TLS versions
- MTA-STS
- TLS-Reporting