Enum Error 

pub enum Error {
    Parse,
    MissingParameters,
    NoHeadersFound,
    Base64,
    NotAligned,
    Io(String),
    Crypto(CryptoError),
    Dns(DnsError),
    Dkim(DkimError),
    Dkim2(Dkim2Error),
}

The error type for every fallible operation in this crate.

Verifiers do not return this type directly; they embed it in their result enums (for example DkimResult::Fail(Error)) to explain why a check did not pass. Parsers, signers and DNS lookup helpers return it through Result.

Variants

Parse

A header, DNS record or key could not be parsed.

MissingParameters

A required tag or parameter was missing from a header or record.

NoHeadersFound

None of the headers selected for signing are present in the message, so there is nothing to sign.

Base64

A Base64 value could not be decoded.

NotAligned

An identifier did not align with the domain it had to match (for example, iprev forward lookups that do not return the client address, or a DMARC identifier alignment failure).

Io(String)

An I/O error. The string holds the underlying error message.

Crypto(CryptoError)

A signing or verification failure reported by the cryptography backend.

Dns(DnsError)

A DNS lookup failure.

Dkim(DkimError)

A DKIM specific failure (RFC 6376).

Dkim2(Dkim2Error)

A DKIM2 specific failure (draft-ietf-dkim-dkim2-spec).

Trait Implementations

impl Clone for Error

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Eq for Error

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for DkimResult

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Dkim2Result

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Error> for DmarcResult

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Error> for IprevResult

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Error> for SpfResult

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Negative> for Error

fn from(negative: Negative) -> Self

Converts to this type from the input type.

impl From<NetError> for Error

fn from(err: NetError) -> Self

Converts to this type from the input type.

impl From<ProtoError> for Error

fn from(_: ProtoError) -> Self

Converts to this type from the input type.

impl PartialEq for Error

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Error