Struct EnhancedStatus 

pub struct EnhancedStatus {
    pub class: u8,
    pub subject: u16,
    pub detail: u16,
}

An enhanced status code from RFC 3463, parsed out of an SMTP reply when the server has advertised the ENHANCEDSTATUSCODES extension (RFC 2034).

Enhanced codes are formatted class.subject.detail, for example 5.7.1 (relay access denied) or 4.7.0 (security feature temporarily unavailable). The basic three-digit reply code (e.g. 550) and the enhanced code share the leading digit (the “class”); the remaining two fields refine the diagnosis far beyond what the basic code carries.

This type is preserved across the Reply on which it is parsed, and reproduced in crate::ProtocolError::UnexpectedCode when an unexpected reply triggers an error. Callers can use the structured fields to make routing decisions (“if subject is 5.1.* the address is permanently bad; if 4.x.x retry later”).

Per RFC 3463 §2:

• class is one of 2, 4, or 5 (success / persistent transient / permanent).
• subject and detail are 0–999.

Fields

class: u8

Leading class digit (2, 4, or 5).

subject: u16

Second field: the broad subject category (e.g. 1 = address, 7 = security/policy).

detail: u16

Third field: the specific detail within the subject.

Implementations

impl EnhancedStatus

pub fn to_dotted(&self) -> String

Format as class.subject.detail. This is the wire form RFC 3463 uses, with the leading dot-decimal and no padding.

Trait Implementations

impl Clone for EnhancedStatus

fn clone(&self) -> EnhancedStatus

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EnhancedStatus

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

Formats the value using the given formatter.

impl Display for EnhancedStatus

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

Formats the value using the given formatter.

impl Hash for EnhancedStatus

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for EnhancedStatus

fn eq(&self, other: &EnhancedStatus) -> 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 Copy for EnhancedStatus

impl Eq for EnhancedStatus

impl StructuralPartialEq for EnhancedStatus