Message Headers

Accept-Language mail [RFC4021] Also-Control netnews obsoleted [RFC1849][RFC5536] Alternate-Recipient mail [RFC4021] Approved netnews standard [RFC5536] ARC-Authentication-Results mail experimental [RFC8617] ARC-Message-Signature mail experimental [RFC8617] ARC-Seal mail experimental [RFC8617] Archive netnews standard [RFC5536] Archived-At mail standard [RFC5064] Archived-At netnews standard [RFC5064] Article-Names netnews obsoleted [RFC1849][RFC5536] Article-Updates netnews obsoleted [RFC1849][RFC5536] Authentication-Results mail standard [RFC8601] Auto-Submitted mail standard [RFC3834 section 5] Autoforwarded mail [RFC4021] Autosubmitted mail [RFC4021] Base MIME obsoleted [RFC1808][RFC2068 Section 14.11] Bcc mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.3] Body none reserved [RFC6068] Cancel-Key netnews standard [RFC8315] Cancel-Lock netnews standard [RFC8315] Cc mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.3] Comments mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.5] Comments netnews standard [RFC5536][RFC-ietf-emailcore-rfc5322bis-12] Content-Alternative MIME [RFC4021] Content-Base MIME obsoleted [RFC2110][RFC2557] Content-Description MIME [RFC4021] Content-Disposition MIME [RFC4021] Content-Duration MIME [RFC4021] Content-features MIME [RFC4021] Content-ID MIME [RFC4021] Content-Identifier mail [RFC4021] Content-Language MIME [RFC4021] Content-Location MIME [RFC4021] Content-MD5 MIME [RFC4021] Content-Return mail [RFC4021] Content-Transfer-Encoding MIME [RFC4021] Content-Translation-Type MIME standard [RFC8255] Content-Type MIME [RFC4021][RFC9788] Control netnews standard [RFC5536] Conversion mail [RFC4021] Conversion-With-Loss mail [RFC4021] DL-Expansion-History mail [RFC4021] Date mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.1] Date netnews standard [RFC5536][RFC-ietf-emailcore-rfc5322bis-12] Date-Received netnews obsoleted [RFC850][RFC5536] Deferred-Delivery mail [RFC4021] Delivery-Date mail [RFC4021] Discarded-X400-IPMS-Extensions mail [RFC4021] Discarded-X400-MTS-Extensions mail [RFC4021] Disclose-Recipients mail [RFC4021] Disposition-Notification-Options mail [RFC4021] Disposition-Notification-To mail [RFC4021] Distribution netnews standard [RFC5536] DKIM-Signature mail standard [RFC6376] Downgraded-Bcc mail obsoleted [RFC5504][RFC6857] Downgraded-Cc mail obsoleted [RFC5504][RFC6857] Downgraded-Disposition-Notification-To mail obsoleted [RFC5504][RFC6857] Downgraded-Final-Recipient mail standard [RFC6857 Section 3.1.10] Downgraded-From mail obsoleted [RFC5504][RFC6857 Section 3.1.10] Downgraded-In-Reply-To mail standard [RFC6857 Section 3.1.10] Downgraded-Mail-From mail obsoleted [RFC5504][RFC6857 Section 3.1.10] Downgraded-Message-Id mail standard [RFC6857 Section 3.1.10] Downgraded-Original-Recipient mail standard [RFC6857 Section 3.1.10] Downgraded-Rcpt-To mail obsoleted [RFC5504][RFC6857] Downgraded-References mail standard [RFC6857 Section 3.1.10] Downgraded-Reply-To mail obsoleted [RFC5504][RFC6857] Downgraded-Resent-Bcc mail obsoleted [RFC5504][RFC6857] Downgraded-Resent-Cc mail obsoleted [RFC5504][RFC6857] Downgraded-Resent-From mail obsoleted [RFC5504][RFC6857] Downgraded-Resent-Reply-To mail obsoleted [RFC5504][RFC6857] Downgraded-Resent-Sender mail obsoleted [RFC5504][RFC6857] Downgraded-Resent-To mail obsoleted [RFC5504][RFC6857] Downgraded-Return-Path mail obsoleted [RFC5504][RFC6857] Downgraded-Sender mail obsoleted [RFC5504][RFC6857] Downgraded-To mail obsoleted [RFC5504][RFC6857] Encoding mail [RFC4021] Encrypted mail [RFC4021] Expires mail [RFC4021] Expires netnews standard [RFC5536] Expiry-Date mail [RFC4021] Followup-To netnews standard [RFC5536] From mail standard no [RFC6854][RFC-ietf-emailcore-rfc5322bis-12, 3.6.2] From netnews standard [RFC5536][RFC-ietf-emailcore-rfc5322bis-12] Generate-Delivery-Report mail [RFC4021] HP-Outer mail standard [RFC9788 Section 2.2.1] Importance mail [RFC4021] In-Reply-To mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.4] Incomplete-Copy mail [RFC4021] Injection-Date netnews standard [RFC5536] Injection-Info netnews standard [RFC5536] Keywords mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.5] Keywords netnews standard [RFC5536][RFC-ietf-emailcore-rfc5322bis-12] Language mail [RFC4021] Latest-Delivery-Time mail [RFC4021] Lines netnews deprecated [RFC5536][RFC3977] List-Archive mail [RFC4021] List-Help mail [RFC4021] List-ID mail [RFC4021] List-Owner mail [RFC4021] List-Post mail [RFC4021] List-Subscribe mail [RFC4021] List-Unsubscribe perm/list-unsubscribe mail [RFC4021] List-Unsubscribe-Post mail standard [RFC8058] Message-Context mail [RFC4021] Message-ID mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.4] Message-ID netnews standard [RFC5536][RFC-ietf-emailcore-rfc5322bis-12] Message-Type mail [RFC4021] MIME-Version MIME [RFC4021] MMHS-Exempted-Address mail [RFC6477][ACP123 Appendix A1.1 and Appendix B.105] MMHS-Extended-Authorisation-Info mail [RFC6477][ACP123 Appendix A1.2 and Appendix B.106] MMHS-Subject-Indicator-Codes mail [RFC6477][ACP123 Appendix A1.3 and Appendix B.107] MMHS-Handling-Instructions mail [RFC6477][ACP123 Appendix A1.4 and Appendix B.108] MMHS-Message-Instructions mail [RFC6477][ACP123 Appendix A1.5 and Appendix B.109] MMHS-Codress-Message-Indicator mail [RFC6477][ACP123 Appendix A1.6 and Appendix B.110] MMHS-Originator-Reference mail [RFC6477][ACP123 Appendix A1.7 and Appendix B.111] MMHS-Primary-Precedence mail [RFC6477][ACP123 Appendix A1.8 and Appendix B.101] MMHS-Copy-Precedence mail [RFC6477][ACP123 Appendix A1.9 and Appendix B.102] MMHS-Message-Type mail [RFC6477][ACP123 Appendix A1.10 and Appendix B.103] MMHS-Other-Recipients-Indicator-To mail [RFC6477][ACP123 Appendix A1.12 and Appendix B.113] MMHS-Other-Recipients-Indicator-CC mail [RFC6477][ACP123 Appendix A1.12 and Appendix B.113] MMHS-Acp127-Message-Identifier mail [RFC6477][ACP123 Appendix A1.14 and Appendix B.116] MMHS-Originator-PLAD mail [RFC6477][ACP123 Appendix A1.15 and Appendix B.117] MT-Priority mail standard [RFC6758] Newsgroups netnews standard [RFC5536] NNTP-Posting-Date netnews obsoleted [RFC5536] NNTP-Posting-Host netnews obsoleted [RFC2980][RFC5536] Obsoletes mail [RFC4021] Organization mail informational [RFC7681] Organization netnews standard [RFC5536] Original-Encoded-Information-Types mail [RFC4021] Original-From mail standard [RFC5703] Original-Message-ID mail [RFC4021] Original-Recipient perm/original-recipient mail standard [RFC3798][RFC5337] Original-Sender netnews standard [RFC5537] Originator-Return-Address mail [RFC4021] Original-Subject mail standard [RFC5703] Path netnews standard [RFC5536] PICS-Label mail [RFC4021] Posting-Version netnews obsoleted [RFC850][RFC5536] Prevent-NonDelivery-Report mail [RFC4021] Priority mail [RFC4021] Received mail standard yes [RFC-ietf-emailcore-rfc5322bis-12, 3.6.7][RFC-ietf-emailcore-rfc5321bis-43] Received-SPF mail standard [RFC7208] References mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.4] References netnews standard [RFC5536][RFC-ietf-emailcore-rfc5322bis-12] Relay-Version netnews obsoleted [RFC850][RFC5536] Reply-By mail [RFC4021] Reply-To mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.2] Reply-To netnews standard [RFC5536][RFC-ietf-emailcore-rfc5322bis-12] Require-Recipient-Valid-Since mail standard [RFC7293] Resent-Bcc mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.6] Resent-Cc mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.6] Resent-Date mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.6] Resent-From mail standard no [RFC6854][RFC-ietf-emailcore-rfc5322bis-12, 3.6.6] Resent-Message-ID mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.6] Resent-Reply-To mail obsoleted no [RFC-ietf-emailcore-rfc5322bis-12, 4.5.6] Resent-Sender mail standard no [RFC6854][RFC-ietf-emailcore-rfc5322bis-12, 3.6.6] Resent-To mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.6] Return-Path mail standard yes [RFC-ietf-emailcore-rfc5322bis-12, 3.6.7][RFC-ietf-emailcore-rfc5321bis-43] See-Also netnews obsoleted [RFC1849][RFC5536] Sender mail standard no [RFC6854][RFC-ietf-emailcore-rfc5322bis-12, 3.6.2] Sender netnews standard [RFC5536][RFC-ietf-emailcore-rfc5322bis-12] Sensitivity mail [RFC4021] Solicitation mail [RFC3865] Subject mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.5] Subject netnews standard [RFC5536][RFC-ietf-emailcore-rfc5322bis-12] Summary netnews standard [RFC5536] Supersedes mail [RFC4021] Supersedes netnews standard [RFC5536][RFC2156] TLS-Report-Domain mail standard [RFC8460] TLS-Report-Submitter mail standard [RFC8460] TLS-Required mail standard [RFC8689] To mail standard no [RFC-ietf-emailcore-rfc5322bis-12, 3.6.3] User-Agent netnews standard [RFC5536][RFC2616] VBR-Info mail standard [RFC5518] X400-Content-Identifier mail [RFC4021] X400-Content-Return mail [RFC4021] X400-Content-Type mail [RFC4021] X400-MTS-Identifier mail [RFC4021] X400-Originator mail [RFC4021] X400-Received mail [RFC4021] X400-Recipients mail [RFC4021] X400-Trace mail [RFC4021] Xref netnews standard [RFC5536]