Struct DkimSignConfig 

pub struct DkimSignConfig {
    pub selector: String,
    pub domain: String,
    pub private_key_pem: String,
    /* private fields */
}

DKIM signing configuration.

The PKCS#8 PEM is parsed into an RsaSigningKey lazily on first use and cached for the lifetime of this config — important on the hot outbound path where every delivered message triggers a sign call. Existing struct-literal callers need to add ..Default::default() (the parsed-key cache is non-public, populated on demand).

v3 (mailrs-dkim 3.0): RsaSigningKey wraps aws-lc-rs’s RsaKeyPair, so per-sign cost dropped from ~1.5 ms (pure-Rust rsa crate) to ~0.5 ms.

Fields

selector: String

DKIM selector — the label under <selector>._domainkey.<domain>.

domain: String

Signing domain (matches the d= tag in the DKIM-Signature header).

private_key_pem: String

Private RSA key in PKCS#8 PEM form.

Implementations

impl DkimSignConfig

pub fn sign(&self, message: &[u8]) -> Result<Vec<u8>, String>

Sign a message, prepending the DKIM-Signature header.

Trait Implementations

impl Clone for DkimSignConfig

fn clone(&self) -> DkimSignConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DkimSignConfig

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

Formats the value using the given formatter.

impl Default for DkimSignConfig

fn default() -> DkimSignConfig

Returns the “default value” for a type.