//! ENHANCEDSTATUSCODES EHLO capability (RFC 3463 ยง4).
/// EHLO capability keyword for enhanced status codes.
///
/// Use with `EhloResponse::has_capability(ENHANCEDSTATUSCODES)` to
/// check whether the server includes RFC 3463 enhanced status codes
/// in its replies.
pub const ENHANCEDSTATUSCODES: &str = "ENHANCEDSTATUSCODES";