Enum Capability

#[non_exhaustive]
pub enum Capability {
    EXPN,
    Help,
    EightBitMIME,
    Size(u32),
    Chunking,
    BinaryMIME,
    Checkpoint,
    DeliverBy,
    Pipelining,
    DSN,
    ETRN,
    EnhancedStatusCodes,
    StartTLS,
    MTRK,
    ATRN,
    Auth(Vec<AuthMechanism>),
    BURL,
    SMTPUTF8,
    RRVS,
    RequireTLS,
    Other {
        keyword: String,
        params: Vec<String>,
    },
}

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

EXPN

Verbose [Eric Allman] One message transaction only [Eric Allman] Expand the mailing list [RFC821] Command description updated by [RFC5321]

Help

Supply helpful information [RFC821] Command description updated by [RFC5321]

EightBitMIME

SMTP and Submit transport of 8bit MIME content [RFC6152]

Size(u32)

Message size declaration [RFC1870]

Chunking

Chunking [RFC3030]

BinaryMIME

Binary MIME [RFC3030]

Checkpoint

Checkpoint/Restart [RFC1845]

DeliverBy

Deliver By [RFC2852]

Pipelining

Command Pipelining [RFC2920]

DSN

Delivery Status Notification [RFC3461]

ETRN

Extended Turn [RFC1985] SMTP [RFC5321] only. Not for use on Submit port 587.

EnhancedStatusCodes

Enhanced Status Codes [RFC2034]

StartTLS

Start TLS [RFC3207]

MTRK

Notification of no soliciting [RFC3865] Message Tracking [RFC3885]

ATRN

Authenticated TURN [RFC2645] SMTP [RFC5321] only. Not for use on Submit port 587.

Auth(Vec<AuthMechanism>)

Authentication [RFC4954]

BURL

Remote Content [RFC4468] Submit [RFC6409] only. Not for use with SMTP on port 25.

SMTPUTF8

Future Message Release [RFC4865] Content Conversion Permission [RFC4141] Content Conversion Negotiation [RFC4141] Internationalized email address [RFC6531]

RRVS

Priority Message Handling [RFC6710] Require Recipient Valid Since [RFC7293]

RequireTLS

Require TLS [RFC8689]

Other

Other

Fields

keyword: String

params: Vec<String>

Implementations

impl Capability

pub fn serialize(&self, writer: &mut impl Write) -> Result<()>

Trait Implementations

impl Clone for Capability

fn clone(&self) -> Capability

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Capability

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

Formats the value using the given formatter.

impl PartialEq for Capability

fn eq(&self, other: &Capability) -> 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 Eq for Capability

impl StructuralPartialEq for Capability