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/// Specifies what kind of mail we want to create.
#[derive(Debug, Clone, Copy, Hash, Eq, PartialEq)]
pub enum MailType {
/// A 7-bit us-ascii mail.
Ascii,
/// A us-ascii mail, but the body can contain 8bit values.
///
/// This for example allows sending a mail with an utf-8
/// formatted body. But be aware that aspects like line
/// length limit still count an the ascii bytes for "\r\n"
/// still count as newlines. So using this for any non-us-ascii
/// compatible encoding (e.g. utf-16) isn't a good idea.
/// Neither is it suited for directly containing resources
/// like images.
Mime8BitEnabled,
/// A internationalized mail.
///
/// Internationalized mails extend multiple grammar parts
/// to allow any non us-ascii utf-8 code point additionally
/// to the already allowed utf-8 code points. Internationalized
/// mails are required for any mail containing a mailbox with
/// an non us-ascii local/user part (the part before the `@`).
/// They also strongly simplify non ascii utf-8 in all other
/// places like e.g. the `Subject` header.
Internationalized
}
impl MailType {
/// Returns true if the self is equal to `Internationalized`
#[inline]
pub fn is_internationalized(&self) -> bool {
*self == MailType::Internationalized
}
/// Returns true if self is either `Internationalized` or `Mime8BitEnabled`
pub fn supports_8bit_bodies( &self ) -> bool {
use self::MailType::*;
match *self {
Ascii => false,
Mime8BitEnabled => true,
Internationalized => true
}
}
}
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