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/*
* meli - headers
*
* Copyright 2020 Manos Pitsidianakis
*
* This file is part of meli.
*
* meli is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* meli is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with meli. If not, see <http://www.gnu.org/licenses/>.
*/
//! Standard header names, associated with standards which define them.
//!
//! This module exposes the types [`Protocol`], [`Standard`] and
//! [`StandardHeader`].
use super::names::*;
bitflags! {
/// A protocol associated with a standard e-mail header.
#[derive(Default, Serialize, Deserialize)]
pub struct Protocol: u32 {
const None = 0b00000001;
const Mail = Self::None.bits() << 1;
const NNTP = Self::Mail.bits() << 1;
const MIME = Self::NNTP.bits() << 1;
const Mbox = Self::MIME.bits() << 1;
}
}
macro_rules! standard_headers {
(
$(
$(#[$docs:meta])*
($konst:ident, $upcase:ident, $name:literal, $template:expr, $(Protocol::$var:tt)|+,$status:expr,$standards:expr);
)+
) => {
/// An enumerator type over statically encoded header names.
///
/// Each variant value corresponds to an associated constant exposing it as a
/// [`HeaderName`] under both [`StandardHeader`] and [`HeaderName`] types.
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
pub enum StandardHeader {
$(
$konst,
)+
}
$(
$(#[$docs])*
pub const $upcase: HeaderName = HeaderName {
inner: Repr::Standard(StandardHeader::$konst),
};
)+
impl HeaderName {
$(
pub const $upcase: Self = $upcase;
)+
}
impl StandardHeader {
#[inline]
pub const fn as_str(&self) -> &'static str {
match *self {
$(
Self::$konst => $name,
)+
}
}
#[inline]
pub const fn protocol(&self) -> Protocol {
match *self {
$(
Self::$konst => Protocol::from_bits_truncate($(Protocol::$var.bits()|)* u32::MAX),
)+
}
}
/// Returns the deprecation status of this header.
#[inline]
pub const fn status(&self) -> Status {
match *self {
$(
Self::$konst => $status,
)+
}
}
/// Returns which standards the definition of this header was lifted from.
#[inline]
pub const fn standards(&self) -> &[Standard] {
match *self {
$(
Self::$konst => $standards,
)+
}
}
// invalid clippy lint match here
#[allow(clippy::string_lit_as_bytes)]
pub fn from_bytes(name_bytes: &[u8]) -> Option<Self> {
match name_bytes {
$(
_ if name_bytes.eq_ignore_ascii_case($name.as_bytes()) => Some(Self::$konst),
)+
_ => None,
}
}
}
#[cfg(test)]
pub(super) const TEST_HEADERS: &[(StandardHeader, &str)] = &[
$(
(StandardHeader::$konst, $name),
)+
];
}
}
macro_rules! standards {
(
$(
$(#[$docs:meta])*
($konst:ident, $name:literal );
)+
) => {
/// An enumerator type over known e-mail standards.
///
/// Each variant value also corresponds to an associated constant.
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum Standard {
$(
$konst,
)+
}
$(
$(#[$docs])*
pub const $konst: Standard = Standard::$konst;
)+
impl Standard {
#[inline]
pub const fn as_str(&self) -> &'static str {
match *self {
$(
Self::$konst => concat!("RFC", $name),
)+
}
}
/// Returns the associated standard URL on the IETF data-tracker website.
///
/// It's value is of the form `https://datatracker.ietf.org/doc/html/rfcN.html` where
/// `N` is the Request for Comments publication number.
#[inline]
pub const fn url(&self) -> &str {
match *self {
$(
Self::$konst => concat!("https://datatracker.ietf.org/doc/html/rfc", $name, ".html"),
)+
}
}
// invalid clippy lint match here
#[allow(clippy::string_lit_as_bytes)]
pub fn from_bytes(name_bytes: &[u8]) -> Option<Self> {
match name_bytes {
$(
_ if name_bytes.eq_ignore_ascii_case($konst.as_str().as_bytes()) => Some(Self::$konst),
)+
_ => None,
}
}
}
};
}
standards! {
(RFC0850, "0850");
(RFC1808, "1808");
(RFC1849, "1849");
(RFC2068, "2068");
(RFC2076, "2076");
(RFC2110, "2110");
(RFC2156, "2156");
(RFC2183, "2183");
(RFC2557, "2557");
(RFC2616, "2616");
(RFC2980, "2980");
(RFC3798, "3798");
(RFC3834, "3834");
(RFC3865, "3865");
(RFC3977, "3977");
(RFC4021, "4021");
(RFC5064, "5064");
(RFC5321, "5321");
(RFC5322, "5322");
(RFC5337, "5337");
(RFC5504, "5504");
(RFC5518, "5518");
(RFC5536, "5536");
(RFC5537, "5537");
(RFC5703, "5703");
(RFC6017, "6017");
(RFC6068, "6068");
(RFC6109, "6109");
(RFC6376, "6376");
(RFC6477, "6477");
(RFC6758, "6758");
(RFC6854, "6854");
(RFC6857, "6857");
(RFC7208, "7208");
(RFC7259, "7259");
(RFC7293, "7293");
(RFC7444, "7444");
(RFC7681, "7681");
(RFC8058, "8058");
(RFC8255, "8255");
(RFC8315, "8315");
(RFC8460, "8460");
(RFC8601, "8601");
(RFC8617, "8617");
(RFC8689, "8689");
(RFC9057, "9057");
(RFC9228, "9228");
}
/// Status of header name field at the moment of writing.
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub enum Status {
/// Deprecated,
Deprecated,
/// Experimental,
Experimental,
/// Informational,
Informational,
/// None,
None,
/// Obsoleted,
Obsoleted,
/// Reserved,
Reserved,
/// Standard,
Standard,
}
// Generate constants for all standard e-mail field headers.
standard_headers! {
/* Unit Variant |Constant ident |Actual field value |Template value |Protocols |Status |Standards */
/* -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- */
(Subject, SUBJECT, "Subject", None, Protocol::Mail | Protocol::NNTP, Status::Standard, &[Standard::RFC5536, Standard::RFC5322]);
(ReplyTo, REPLY_TO, "Reply-To", None, Protocol::Mail | Protocol::NNTP, Status::Standard, &[Standard::RFC5536, Standard::RFC5322]);
(InReplyTo, IN_REPLY_TO, "In-Reply-To", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(References, REFERENCES, "References", None, Protocol::Mail | Protocol::NNTP, Status::Standard, &[Standard::RFC5536, Standard::RFC5322]);
(MailReplyTo, MAIL_REPLY_TO, "Mail-Reply-To", None, Protocol::Mail, Status::None, &[]);
(MailFollowupTo, MAIL_FOLLOWUP_TO, "Mail-Followup-To", None, Protocol::Mail, Status::None, &[]);
(DeliveredTo, DELIVERED_TO, "Delivered-To", None, Protocol::Mail, Status::None, &[Standard::RFC9228]);
(Comments, COMMENTS, "Comments", None, Protocol::Mail, Status::None, &[]);
(Keywords, KEYWORDS, "Keywords", None, Protocol::Mail, Status::None, &[]);
(Received, RECEIVED, "Received", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322, Standard::RFC5321]);
(ContentLanguage, CONTENT_LANGUAGE, "Content-Language", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(ContentLength, CONTENT_LENGTH, "Content-Length", None, Protocol::Mail, Status::None, &[]);
(Forwarded, FORWARDED, "Forwarded", None, Protocol::Mail, Status::None, &[]);
(AcceptLanguage, ACCEPT_LANGUAGE, "Accept-Language", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(AlsoControl, ALSO_CONTROL, "Also-Control", None, Protocol::NNTP, Status::Obsoleted, &[Standard::RFC1849, Standard::RFC5536]);
(AlternateRecipient, ALTERNATE_RECIPIENT, "Alternate-Recipient", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Approved, APPROVED, "Approved", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(ArcAuthenticationResults, ARC_AUTHENTICATION_RESULTS, "ARC-Authentication-Results", None, Protocol::Mail, Status::Experimental, &[Standard::RFC8617]);
(ArcMessageSignature, ARC_MESSAGE_SIGNATURE, "ARC-Message-Signature", None, Protocol::Mail, Status::Experimental, &[Standard::RFC8617]);
(ArcSeal, ARC_SEAL, "ARC-Seal", None, Protocol::Mail, Status::Experimental, &[Standard::RFC8617]);
(Archive, ARCHIVE, "Archive", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(ArchivedAt, ARCHIVED_AT, "Archived-At", None, Protocol::Mail | Protocol::NNTP, Status::Standard, &[Standard::RFC5064]);
(ArticleNames, ARTICLE_NAMES, "Article-Names", None, Protocol::NNTP, Status::Obsoleted, &[Standard::RFC1849, Standard::RFC5536]);
(ArticleUpdates, ARTICLE_UPDATES, "Article-Updates", None, Protocol::NNTP, Status::Obsoleted, &[Standard::RFC1849, Standard::RFC5536]);
(AuthenticationResults, AUTHENTICATION_RESULTS, "Authentication-Results", None, Protocol::Mail, Status::Standard, &[Standard::RFC8601]);
(AutoSubmitted, AUTO_SUBMITTED, "Auto-Submitted", None, Protocol::Mail, Status::Standard, &[Standard::RFC3834]);
(Autoforwarded, AUTOFORWARDED, "Autoforwarded", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Autosubmitted, AUTOSUBMITTED, "Autosubmitted", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Base, BASE, "Base", None, Protocol::MIME, Status::Obsoleted, &[Standard::RFC1808, Standard::RFC2068]);
(Bcc, BCC, "Bcc", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(Body, BODY, "Body", None, Protocol::None, Status::Reserved, &[Standard::RFC6068]);
(CancelKey, CANCEL_KEY, "Cancel-Key", None, Protocol::NNTP, Status::Standard, &[Standard::RFC8315]);
(CancelLock, CANCEL_LOCK, "Cancel-Lock", None, Protocol::NNTP, Status::Standard, &[Standard::RFC8315]);
(Cc, CC, "Cc", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(ContentAlternative, CONTENT_ALTERNATIVE, "Content-Alternative", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(ContentBase, CONTENT_BASE, "Content-Base", None, Protocol::MIME, Status::Obsoleted, &[Standard::RFC2110, Standard::RFC2557]);
(ContentDescription, CONTENT_DESCRIPTION, "Content-Description", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(ContentDisposition, CONTENT_DISPOSITION, "Content-Disposition", None, Protocol::MIME, Status::None, &[Standard::RFC2183, Standard::RFC4021]);
(ContentDuration, CONTENT_DURATION, "Content-Duration", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(ContentFeatures, CONTENT_FEATURES, "Content-Features", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(ContentId, CONTENT_ID, "Content-ID", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(ContentIdentifier, CONTENT_IDENTIFIER, "Content-Identifier", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ContentLocation, CONTENT_LOCATION, "Content-Location", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(ContentMd5, CONTENT_MD5, "Content-MD5", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(ContentReturn, CONTENT_RETURN, "Content-Return", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ContentTransferEncoding, CONTENT_TRANSFER_ENCODING, "Content-Transfer-Encoding", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(ContentTranslationType, CONTENT_TRANSLATION_TYPE, "Content-Translation-Type", None, Protocol::MIME, Status::Standard, &[Standard::RFC8255]);
(ContentType, CONTENT_TYPE, "Content-Type", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(Control, CONTROL, "Control", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(Conversion, CONVERSION, "Conversion", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ConversionWithLoss, CONVERSION_WITH_LOSS, "Conversion-With-Loss", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(DlExpansionHistory, DL_EXPANSION_HISTORY, "DL-Expansion-History", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Date, DATE, "Date", None, Protocol::Mail | Protocol::NNTP, Status::Standard, &[Standard::RFC5536, Standard::RFC5322]);
(DateReceived, DATE_RECEIVED, "Date-Received", None, Protocol::NNTP, Status::Obsoleted, &[Standard::RFC0850, Standard::RFC5536]);
(DeferredDelivery, DEFERRED_DELIVERY, "Deferred-Delivery", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(DeliveryDate, DELIVERY_DATE, "Delivery-Date", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(DiscardedX400IpmsExtensions, DISCARDED_X400_IPMS_EXTENSIONS, "Discarded-X400-IPMS-Extensions", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(DiscardedX400MtsExtensions, DISCARDED_X400_MTS_EXTENSIONS, "Discarded-X400-MTS-Extensions", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(DiscloseRecipients, DISCLOSE_RECIPIENTS, "Disclose-Recipients", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(DispositionNotificationOptions, DISPOSITION_NOTIFICATION_OPTIONS, "Disposition-Notification-Options", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(DispositionNotificationTo, DISPOSITION_NOTIFICATION_TO, "Disposition-Notification-To", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Distribution, DISTRIBUTION, "Distribution", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(DkimSignature, DKIM_SIGNATURE, "DKIM-Signature", None, Protocol::Mail, Status::Standard, &[Standard::RFC6376]);
(DowngradedBcc, DOWNGRADED_BCC, "Downgraded-Bcc", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedCc, DOWNGRADED_CC, "Downgraded-Cc", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedDispositionNotificationTo, DOWNGRADED_DISPOSITION_NOTIFICATION_TO, "Downgraded-Disposition-Notification-To", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedFinalRecipient, DOWNGRADED_FINAL_RECIPIENT, "Downgraded-Final-Recipient", None, Protocol::Mail, Status::Standard, &[Standard::RFC6857]);
(DowngradedFrom, DOWNGRADED_FROM, "Downgraded-From", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedInReplyTo, DOWNGRADED_IN_REPLY_TO, "Downgraded-In-Reply-To", None, Protocol::Mail, Status::Standard, &[Standard::RFC6857]);
(DowngradedMailFrom, DOWNGRADED_MAIL_FROM, "Downgraded-Mail-From", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedMessageId, DOWNGRADED_MESSAGE_ID, "Downgraded-Message-Id", None, Protocol::Mail, Status::Standard, &[Standard::RFC6857]);
(DowngradedOriginalRecipient, DOWNGRADED_ORIGINAL_RECIPIENT, "Downgraded-Original-Recipient", None, Protocol::Mail, Status::Standard, &[Standard::RFC6857]);
(DowngradedRcptTo, DOWNGRADED_RCPT_TO, "Downgraded-Rcpt-To", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedReferences, DOWNGRADED_REFERENCES, "Downgraded-References", None, Protocol::Mail, Status::Standard, &[Standard::RFC6857]);
(DowngradedReplyTo, DOWNGRADED_REPLY_TO, "Downgraded-Reply-To", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedResentBcc, DOWNGRADED_RESENT_BCC, "Downgraded-Resent-Bcc", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedResentCc, DOWNGRADED_RESENT_CC, "Downgraded-Resent-Cc", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedResentFrom, DOWNGRADED_RESENT_FROM, "Downgraded-Resent-From", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedResentReplyTo, DOWNGRADED_RESENT_REPLY_TO, "Downgraded-Resent-Reply-To", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedResentSender, DOWNGRADED_RESENT_SENDER, "Downgraded-Resent-Sender", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedResentTo, DOWNGRADED_RESENT_TO, "Downgraded-Resent-To", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedReturnPath, DOWNGRADED_RETURN_PATH, "Downgraded-Return-Path", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedSender, DOWNGRADED_SENDER, "Downgraded-Sender", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(DowngradedTo, DOWNGRADED_TO, "Downgraded-To", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5504, Standard::RFC6857]);
(Encoding, ENCODING, "Encoding", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Encrypted, ENCRYPTED, "Encrypted", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Expires, EXPIRES, "Expires", None, Protocol::Mail | Protocol::NNTP, Status::None, &[Standard::RFC4021, Standard::RFC5536]);
(ExpiryDate, EXPIRY_DATE, "Expiry-Date", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(FollowupTo, FOLLOWUP_TO, "Followup-To", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(From, FROM, "From", None, Protocol::Mail | Protocol::NNTP, Status::Standard, &[Standard::RFC5322, Standard::RFC6854]);
(GenerateDeliveryReport, GENERATE_DELIVERY_REPORT, "Generate-Delivery-Report", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Importance, IMPORTANCE, "Importance", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(IncompleteCopy, INCOMPLETE_COPY, "Incomplete-Copy", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(InjectionDate, INJECTION_DATE, "Injection-Date", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(InjectionInfo, INJECTION_INFO, "Injection-Info", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(Language, LANGUAGE, "Language", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(LatestDeliveryTime, LATEST_DELIVERY_TIME, "Latest-Delivery-Time", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Lines, LINES, "Lines", None, Protocol::NNTP, Status::Deprecated, &[Standard::RFC5536, Standard::RFC3977]);
(ListArchive, LIST_ARCHIVE, "List-Archive", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ListHelp, LIST_HELP, "List-Help", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ListId, LIST_ID, "List-ID", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ListOwner, LIST_OWNER, "List-Owner", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ListPost, LIST_POST, "List-Post", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ListSubscribe, LIST_SUBSCRIBE, "List-Subscribe", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ListUnsubscribe, LIST_UNSUBSCRIBE, "List-Unsubscribe", Some("perm/list-unsubscribe"), Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ListUnsubscribePost, LIST_UNSUBSCRIBE_POST, "List-Unsubscribe-Post", None, Protocol::Mail, Status::Standard, &[Standard::RFC8058]);
(MessageContext, MESSAGE_CONTEXT, "Message-Context", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(MessageId, MESSAGE_ID, "Message-ID", None, Protocol::Mail | Protocol::NNTP, Status::Standard, &[Standard::RFC5322, Standard::RFC5536]);
(MessageType, MESSAGE_TYPE, "Message-Type", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(MimeVersion, MIME_VERSION, "MIME-Version", None, Protocol::MIME, Status::None, &[Standard::RFC4021]);
(MtPriority, MT_PRIORITY, "MT-Priority", None, Protocol::Mail, Status::Standard, &[Standard::RFC6758]);
(Newsgroups, NEWSGROUPS, "Newsgroups", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(NntpPostingDate, NNTP_POSTING_DATE, "NNTP-Posting-Date", None, Protocol::NNTP, Status::Obsoleted, &[Standard::RFC5536]);
(NntpPostingHost, NNTP_POSTING_HOST, "NNTP-Posting-Host", None, Protocol::NNTP, Status::Obsoleted, &[Standard::RFC2980, Standard::RFC5536]);
(Obsoletes, OBSOLETES, "Obsoletes", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Organization, ORGANIZATION, "Organization", None, Protocol::Mail | Protocol::NNTP, Status::Informational, &[Standard::RFC7681, Standard::RFC5536]);
(OriginalEncodedInformationTypes, ORIGINAL_ENCODED_INFORMATION_TYPES, "Original-Encoded-Information-Types", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(OriginalFrom, ORIGINAL_FROM, "Original-From", None, Protocol::Mail, Status::Standard, &[Standard::RFC5703]);
(OriginalMessageId, ORIGINAL_MESSAGE_ID, "Original-Message-ID", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(OriginalRecipient, ORIGINAL_RECIPIENT, "Original-Recipient", Some("perm/original-recipient"),Protocol::Mail, Status::Standard, &[Standard::RFC3798, Standard::RFC5337]);
(OriginalSender, ORIGINAL_SENDER, "Original-Sender", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5537]);
(OriginatorReturnAddress, ORIGINATOR_RETURN_ADDRESS, "Originator-Return-Address", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(OriginalSubject, ORIGINAL_SUBJECT, "Original-Subject", None, Protocol::Mail, Status::Standard, &[Standard::RFC5703]);
(Path, PATH, "Path", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(PicsLabel, PICS_LABEL, "PICS-Label", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(PostingVersion, POSTING_VERSION, "Posting-Version", None, Protocol::NNTP, Status::Obsoleted, &[Standard::RFC0850, Standard::RFC5536]);
(PreventNondeliveryReport, PREVENT_NONDELIVERY_REPORT, "Prevent-NonDelivery-Report", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Priority, PRIORITY, "Priority", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(ReceivedSpf, RECEIVED_SPF, "Received-SPF", None, Protocol::Mail, Status::Standard, &[Standard::RFC7208]);
(RelayVersion, RELAY_VERSION, "Relay-Version", None, Protocol::NNTP, Status::Obsoleted, &[Standard::RFC0850, Standard::RFC5536]);
(ReplyBy, REPLY_BY, "Reply-By", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(RequireRecipientValidSince, REQUIRE_RECIPIENT_VALID_SINCE, "Require-Recipient-Valid-Since", None, Protocol::Mail, Status::Standard, &[Standard::RFC7293]);
(ResentBcc, RESENT_BCC, "Resent-Bcc", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(ResentCc, RESENT_CC, "Resent-Cc", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(ResentDate, RESENT_DATE, "Resent-Date", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(ResentFrom, RESENT_FROM, "Resent-From", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322, Standard::RFC6854]);
(ResentMessageId, RESENT_MESSAGE_ID, "Resent-Message-ID", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(ResentReplyTo, RESENT_REPLY_TO, "Resent-Reply-To", None, Protocol::Mail, Status::Obsoleted, &[Standard::RFC5322]);
(ResentSender, RESENT_SENDER, "Resent-Sender", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322, Standard::RFC6854]);
(ResentTo, RESENT_TO, "Resent-To", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(ReturnPath, RETURN_PATH, "Return-Path", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(SeeAlso, SEE_ALSO, "See-Also", None, Protocol::NNTP, Status::Obsoleted, &[Standard::RFC1849, Standard::RFC5536]);
(Sender, SENDER, "Sender", None, Protocol::Mail | Protocol::NNTP, Status::Standard, &[Standard::RFC5322, Standard::RFC6854]);
(Sensitivity, SENSITIVITY, "Sensitivity", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Solicitation, SOLICITATION, "Solicitation", None, Protocol::Mail, Status::None, &[Standard::RFC3865]);
(Status, STATUS, "Status", None, Protocol::Mbox, Status::None, &[]);
(Summary, SUMMARY, "Summary", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(Supersedes, SUPERSEDES, "Supersedes", None, Protocol::Mail | Protocol::NNTP, Status::None, &[Standard::RFC5536, Standard::RFC2156]);
(TlsReportDomain, TLS_REPORT_DOMAIN, "TLS-Report-Domain", None, Protocol::Mail, Status::Standard, &[Standard::RFC8460]);
(TlsReportSubmitter, TLS_REPORT_SUBMITTER, "TLS-Report-Submitter", None, Protocol::Mail, Status::Standard, &[Standard::RFC8460]);
(TlsRequired, TLS_REQUIRED, "TLS-Required", None, Protocol::Mail, Status::Standard, &[Standard::RFC8689]);
(To, TO, "To", None, Protocol::Mail, Status::Standard, &[Standard::RFC5322]);
(UserAgent, USER_AGENT, "User-Agent", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536, Standard::RFC2616]);
(VbrInfo, VBR_INFO, "VBR-Info", None, Protocol::Mail, Status::Standard, &[Standard::RFC5518]);
(X400ContentIdentifier, X400_CONTENT_IDENTIFIER, "X400-Content-Identifier", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(X400ContentReturn, X400_CONTENT_RETURN, "X400-Content-Return", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(X400ContentType, X400_CONTENT_TYPE, "X400-Content-Type", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(X400MtsIdentifier, X400_MTS_IDENTIFIER, "X400-MTS-Identifier", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(X400Originator, X400_ORIGINATOR, "X400-Originator", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(X400Received, X400_RECEIVED, "X400-Received", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(X400Recipients, X400_RECIPIENTS, "X400-Recipients", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(X400Trace, X400_TRACE, "X400-Trace", None, Protocol::Mail, Status::None, &[Standard::RFC4021]);
(Xref, XREF, "Xref", None, Protocol::NNTP, Status::Standard, &[Standard::RFC5536]);
(ApparentlyTo, APPARENTLY_TO, "Apparently-To", Some("prov/apparently-to"), Protocol::Mail, Status::None, &[Standard::RFC2076]);
(Author, AUTHOR, "Author", None, Protocol::Mail, Status::None, &[Standard::RFC9057]);
(EdiintFeatures, EDIINT_FEATURES, "EDIINT-Features", None, Protocol::Mail, Status::None, &[Standard::RFC6017]);
(EesstVersion, EESST_VERSION, "Eesst-Version", None, Protocol::Mail, Status::None, &[Standard::RFC7681]);
(ErrorsTo, ERRORS_TO, "Errors-To", Some("prov/errors-to"), Protocol::Mail, Status::None, &[Standard::RFC2076]);
(JabberId, JABBER_ID, "Jabber-ID", Some("prov/jabber-id"), Protocol::Mail | Protocol::NNTP, Status::None, &[Standard::RFC7259]);
(SioLabel, SIO_LABEL, "SIO-Label", None, Protocol::Mail, Status::None, &[Standard::RFC7444]);
(SioLabelHistory, SIO_LABEL_HISTORY, "SIO-Label-History", None, Protocol::Mail, Status::None, &[Standard::RFC7444]);
(XArchivedAt, X_ARCHIVED_AT, "X-Archived-At", Some("prov/x-archived-at"), Protocol::Mail | Protocol::NNTP, Status::Deprecated, &[Standard::RFC5064]);
(XKeywords, X_KEYWORDS, "X-Keywords", None, Protocol::Mbox, Status::None, &[]);
(XMittente, X_MITTENTE, "X-Mittente", None, Protocol::Mail, Status::None, &[Standard::RFC6109]);
(XRicevuta, X_RICEVUTA, "X-Ricevuta", None, Protocol::Mail, Status::None, &[Standard::RFC6109]);
(XRiferimentoMessageId, X_RIFERIMENTO_MESSAGE_ID, "X-Riferimento-Message-ID", None, Protocol::Mail, Status::None, &[Standard::RFC6109]);
(XStatus, X_STATUS, "X-Status", None, Protocol::Mbox, Status::None, &[]);
(XTiporicevuta, X_TIPORICEVUTA, "X-TipoRicevuta", None, Protocol::Mail, Status::None, &[Standard::RFC6109]);
(XTrasporto, X_TRASPORTO, "X-Trasporto", None, Protocol::Mail, Status::None, &[Standard::RFC6109]);
(XVerificasicurezza, X_VERIFICASICUREZZA, "X-VerificaSicurezza", None, Protocol::Mail, Status::None, &[Standard::RFC6109]);
}