services.postfix.settings.main.smtp_tls_security_level
The client TLS security level.
Use dane with a local DNSSEC validating DNS resolver enabled.
https://www.postfix.org/postconf.5.html#smtp_tls_security_level
- Type
one of "none", "may", "encrypt", "dane", "dane-only", "fingerprint", "verify", "secure"- Default
"may"- Declared
- <nixpkgs/nixos/modules/services/mail/postfix.nix>