Enum DaneStatus 

pub enum DaneStatus {
    NotApplicable,
    Records(Vec<TLSA>),
    Unusable,
    TempFail(String),
}

The outcome of attempting to resolve DANE TLSA records for an MX host, per https://datatracker.ietf.org/doc/html/rfc7672.

Variants

NotApplicable

The host is not DANE-eligible: either the MX host’s address (A/AAAA) RRset was not securely (DNSSEC) resolved, or there was a secure proof that no TLSA records exist (NODATA/NXDOMAIN). Delivery should continue using the normal (opportunistic / configured) TLS policy.

Records(Vec<TLSA>)

Secure, usable DANE-TA(2)/DANE-EE(3) TLSA records were found. The connection must use TLS and authenticate the peer against these records.

Unusable

Secure TLSA records were published, but none are usable for DANE SMTP (e.g. only PKIX-TA(0)/PKIX-EE(1), private/unassigned usages, or unsupported selector/matching types). Per RFC 7672 section 4.1 the client must still require STARTTLS but cannot authenticate the peer.

TempFail(String)

The secure status of the TLSA records (or of the MX host’s address records) could not be determined, e.g. due to SERVFAIL, a timeout, or a DNSSEC validation failure (bogus). To preserve downgrade resistance the delivery must be deferred rather than continuing without authentication.

Trait Implementations

impl Clone for DaneStatus

fn clone(&self) -> DaneStatus

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DaneStatus

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for DaneStatus

fn eq(&self, other: &DaneStatus) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for DaneStatus