permanent-message-headers.csv

A-IM,,http,,[RFC4229]
Accept,,http,standard,"[RFC7231, Section 5.3.2]"
Accept-Additions,,http,,[RFC4229]
Accept-Charset,,http,standard,"[RFC7231, Section 5.3.3]"
Accept-Datetime,,http,informational,[RFC7089]
Accept-Encoding,,http,standard,"[RFC7231, Section 5.3.4][RFC7694, Section 3]"
Accept-Features,,http,,[RFC4229]
Accept-Language,,http,standard,"[RFC7231, Section 5.3.5]"
Accept-Language,,mail,,[RFC4021]
Accept-Patch,,http,,[RFC5789]
Accept-Post,perm/accept-post,http,standard,[https://www.w3.org/TR/ldp/]
Accept-Ranges,,http,standard,"[RFC7233, Section 2.3]"
Age,,http,standard,"[RFC7234, Section 5.1]"
Allow,,http,standard,"[RFC7231, Section 7.4.1]"
ALPN,,http,standard,"[RFC7639, Section 2]"
Also-Control,,netnews,obsoleted,[RFC1849][RFC5536]
Alt-Svc,,http,standard,[RFC7838]
Alt-Used,,http,standard,[RFC7838]
Alternate-Recipient,,mail,,[RFC4021]
Alternates,,http,,[RFC4229]
Apply-To-Redirect-Ref,,http,,[RFC4437]
Approved,,netnews,standard,[RFC5536]
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-Control,,http,experimental,"[RFC8053, Section 4]"
Authentication-Info,,http,standard,"[RFC7615, Section 3]"
Authentication-Results,,mail,standard,[RFC7601]
Authorization,,http,standard,"[RFC7235, Section 4.2]"
Auto-Submitted,,mail,standard,[RFC3834 section 5]
Autoforwarded,,mail,,[RFC4021]
Autosubmitted,,mail,,[RFC4021]
Base,,MIME,obsoleted,[RFC1808][RFC2068 Section 14.11]
Bcc,,mail,standard,[RFC5322]
Body,,none,reserved,[RFC6068]
C-Ext,,http,,[RFC4229]
C-Man,,http,,[RFC4229]
C-Opt,,http,,[RFC4229]
C-PEP,,http,,[RFC4229]
C-PEP-Info,,http,,[RFC4229]
Cache-Control,,http,standard,"[RFC7234, Section 5.2]"
CalDAV-Timezones,,http,standard,"[RFC7809, Section 7.1]"
Cancel-Key,,netnews,standard,[RFC-baeuerle-netnews-cancel-lock-09]
Cancel-Lock,,netnews,standard,[RFC-baeuerle-netnews-cancel-lock-09]
Cc,,mail,standard,[RFC5322]
Close,,http,reserved,"[RFC7230, Section 8.1]"
Comments,,mail,standard,[RFC5322]
Comments,,netnews,standard,[RFC5536][RFC5322]
Connection,,http,standard,"[RFC7230, Section 6.1]"
Content-Alternative,,MIME,,[RFC4021]
Content-Base,,http,obsoleted,[RFC2068][RFC2616]
Content-Base,,MIME,obsoleted,[RFC2110][RFC2557]
Content-Description,,MIME,,[RFC4021]
Content-Disposition,,http,standard,[RFC6266]
Content-Disposition,,MIME,,[RFC4021]
Content-Duration,,MIME,,[RFC4021]
Content-Encoding,,http,standard,"[RFC7231, Section 3.1.2.2]"
Content-features,,MIME,,[RFC4021]
Content-ID,,http,,[RFC4229]
Content-ID,,MIME,,[RFC4021]
Content-Identifier,,mail,,[RFC4021]
Content-Language,,http,standard,"[RFC7231, Section 3.1.3.2]"
Content-Language,,MIME,,[RFC4021]
Content-Length,,http,standard,"[RFC7230, Section 3.3.2]"
Content-Location,,http,standard,"[RFC7231, Section 3.1.4.2]"
Content-Location,,MIME,,[RFC4021]
Content-MD5,,http,,[RFC4229]
Content-MD5,,MIME,,[RFC4021]
Content-Range,,http,standard,"[RFC7233, Section 4.2]"
Content-Return,,mail,,[RFC4021]
Content-Script-Type,,http,,[RFC4229]
Content-Style-Type,,http,,[RFC4229]
Content-Transfer-Encoding,,MIME,,[RFC4021]
Content-Translation-Type,,MIME,standard,[RFC8255]
Content-Type,,http,standard,"[RFC7231, Section 3.1.1.5]"
Content-Type,,MIME,,[RFC4021]
Content-Version,,http,,[RFC4229]
Control,,netnews,standard,[RFC5536]
Conversion,,mail,,[RFC4021]
Conversion-With-Loss,,mail,,[RFC4021]
Cookie,,http,standard,[RFC6265]
Cookie2,,http,obsoleted,[RFC2965][RFC6265]
DASL,,http,standard,[RFC5323]
DAV,,http,standard,[RFC4918]
DL-Expansion-History,,mail,,[RFC4021]
Date,,http,standard,"[RFC7231, Section 7.1.1.2]"
Date,,mail,standard,[RFC5322]
Date,,netnews,standard,[RFC5536][RFC5322]
Date-Received,,netnews,obsoleted,[RFC0850][RFC5536]
Default-Style,,http,,[RFC4229]
Deferred-Delivery,,mail,,[RFC4021]
Delivery-Date,,mail,,[RFC4021]
Delta-Base,,http,,[RFC4229]
Depth,,http,standard,[RFC4918]
Derived-From,,http,,[RFC4229]
Destination,,http,standard,[RFC4918]
Differential-ID,,http,,[RFC4229]
Digest,,http,,[RFC4229]
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]
ETag,,http,standard,"[RFC7232, Section 2.3]"
Expect,,http,standard,"[RFC7231, Section 5.1.1]"
Expires,,http,standard,"[RFC7234, Section 5.3]"
Expires,,mail,,[RFC4021]
Expires,,netnews,standard,[RFC5536]
Expiry-Date,,mail,,[RFC4021]
Ext,,http,,[RFC4229]
Followup-To,,netnews,standard,[RFC5536]
Forwarded,,http,standard,[RFC7239]
From,,http,standard,"[RFC7231, Section 5.5.1]"
From,,mail,standard,[RFC5322][RFC6854]
From,,netnews,standard,[RFC5536][RFC5322]
Generate-Delivery-Report,,mail,,[RFC4021]
GetProfile,,http,,[RFC4229]
Hobareg,,http,experimental,"[RFC7486, Section 6.1.1]"
Host,,http,standard,"[RFC7230, Section 5.4]"
HTTP2-Settings,,http,standard,"[RFC7540, Section 3.2.1]"
IM,,http,,[RFC4229]
If,,http,standard,[RFC4918]
If-Match,,http,standard,"[RFC7232, Section 3.1]"
If-Modified-Since,,http,standard,"[RFC7232, Section 3.3]"
If-None-Match,,http,standard,"[RFC7232, Section 3.2]"
If-Range,,http,standard,"[RFC7233, Section 3.2]"
If-Schedule-Tag-Match,,http,standard,[RFC6638]
If-Unmodified-Since,,http,standard,"[RFC7232, Section 3.4]"
Importance,,mail,,[RFC4021]
In-Reply-To,,mail,standard,[RFC5322]
Incomplete-Copy,,mail,,[RFC4021]
Injection-Date,,netnews,standard,[RFC5536]
Injection-Info,,netnews,standard,[RFC5536]
Keep-Alive,,http,,[RFC4229]
Keywords,,mail,standard,[RFC5322]
Keywords,,netnews,standard,[RFC5536][RFC5322]
Label,,http,,[RFC4229]
Language,,mail,,[RFC4021]
Last-Modified,,http,standard,"[RFC7232, Section 2.2]"
Latest-Delivery-Time,,mail,,[RFC4021]
Lines,,netnews,deprecated,[RFC5536][RFC3977]
Link,,http,standard,[RFC8288]
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]
Location,,http,standard,"[RFC7231, Section 7.1.2]"
Lock-Token,,http,standard,[RFC4918]
Man,,http,,[RFC4229]
Max-Forwards,,http,standard,"[RFC7231, Section 5.1.2]"
Memento-Datetime,,http,informational,[RFC7089]
Message-Context,,mail,,[RFC4021]
Message-ID,,mail,standard,[RFC5322]
Message-ID,,netnews,standard,[RFC5536][RFC5322]
Message-Type,,mail,,[RFC4021]
Meter,,http,,[RFC4229]
MIME-Version,,http,standard,"[RFC7231, Appendix A.1]"
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]
Negotiate,,http,,[RFC4229]
Newsgroups,,netnews,standard,[RFC5536]
NNTP-Posting-Date,,netnews,obsoleted,[RFC5536]
NNTP-Posting-Host,,netnews,obsoleted,[RFC2980][RFC5536]
Obsoletes,,mail,,[RFC4021]
Opt,,http,,[RFC4229]
Optional-WWW-Authenticate,,http,experimental,"[RFC8053, Section 3]"
Ordering-Type,,http,standard,[RFC4229]
Organization,,mail,informational,[RFC7681]
Organization,,netnews,standard,[RFC5536]
Origin,,http,standard,[RFC6454]
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]
Overwrite,,http,standard,[RFC4918]
P3P,,http,,[RFC4229]
Path,,netnews,standard,[RFC5536]
PEP,,http,,[RFC4229]
PICS-Label,,http,,[RFC4229]
PICS-Label,,mail,,[RFC4021]
Pep-Info,,http,,[RFC4229]
Position,,http,standard,[RFC4229]
Posting-Version,,netnews,obsoleted,[RFC0850][RFC5536]
Pragma,,http,standard,"[RFC7234, Section 5.4]"
Prefer,,http,standard,[RFC7240]
Preference-Applied,,http,standard,[RFC7240]
Prevent-NonDelivery-Report,,mail,,[RFC4021]
Priority,,mail,,[RFC4021]
ProfileObject,,http,,[RFC4229]
Protocol,,http,,[RFC4229]
Protocol-Info,,http,,[RFC4229]
Protocol-Query,,http,,[RFC4229]
Protocol-Request,,http,,[RFC4229]
Proxy-Authenticate,,http,standard,"[RFC7235, Section 4.3]"
Proxy-Authentication-Info,,http,standard,"[RFC7615, Section 4]"
Proxy-Authorization,,http,standard,"[RFC7235, Section 4.4]"
Proxy-Features,,http,,[RFC4229]
Proxy-Instruction,,http,,[RFC4229]
Public,,http,,[RFC4229]
Public-Key-Pins,,http,standard,[RFC7469]
Public-Key-Pins-Report-Only,,http,standard,[RFC7469]
Range,,http,standard,"[RFC7233, Section 3.1]"
Received,,mail,standard,[RFC5322][RFC5321]
Received-SPF,,mail,standard,[RFC7208]
Redirect-Ref,,http,,[RFC4437]
References,,mail,standard,[RFC5322]
References,,netnews,standard,[RFC5536][RFC5322]
Referer,,http,standard,"[RFC7231, Section 5.5.2]"
Relay-Version,,netnews,obsoleted,[RFC0850][RFC5536]
Reply-By,,mail,,[RFC4021]
Reply-To,,mail,standard,[RFC5322]
Reply-To,,netnews,standard,[RFC5536][RFC5322]
Require-Recipient-Valid-Since,,mail,standard,[RFC7293]
Resent-Bcc,,mail,standard,[RFC5322]
Resent-Cc,,mail,standard,[RFC5322]
Resent-Date,,mail,standard,[RFC5322]
Resent-From,,mail,standard,[RFC5322][RFC6854]
Resent-Message-ID,,mail,standard,[RFC5322]
Resent-Reply-To,,mail,obsoleted,[RFC5322]
Resent-Sender,,mail,standard,[RFC5322][RFC6854]
Resent-To,,mail,standard,[RFC5322]
Retry-After,,http,standard,"[RFC7231, Section 7.1.3]"
Return-Path,,mail,standard,[RFC5322]
Safe,,http,,[RFC4229]
Schedule-Reply,,http,standard,[RFC6638]
Schedule-Tag,,http,standard,[RFC6638]
Sec-WebSocket-Accept,,http,standard,[RFC6455]
Sec-WebSocket-Extensions,,http,standard,[RFC6455]
Sec-WebSocket-Key,,http,standard,[RFC6455]
Sec-WebSocket-Protocol,,http,standard,[RFC6455]
Sec-WebSocket-Version,,http,standard,[RFC6455]
Security-Scheme,,http,,[RFC4229]
See-Also,,netnews,obsoleted,[RFC1849][RFC5536]
Sender,,mail,standard,[RFC5322][RFC6854]
Sender,,netnews,standard,[RFC5536][RFC5322]
Sensitivity,,mail,,[RFC4021]
Server,,http,standard,"[RFC7231, Section 7.4.2]"
Set-Cookie,,http,standard,[RFC6265]
Set-Cookie2,,http,obsoleted,[RFC2965][RFC6265]
SetProfile,,http,,[RFC4229]
SLUG,,http,standard,[RFC5023]
SoapAction,,http,,[RFC4229]
Solicitation,,mail,,[RFC3865]
Status-URI,,http,,[RFC4229]
Strict-Transport-Security,,http,standard,[RFC6797]
Subject,,mail,standard,[RFC5322]
Subject,,netnews,standard,[RFC5536][RFC5322]
Summary,,netnews,standard,[RFC5536]
Supersedes,,mail,,[RFC4021]
Supersedes,,netnews,standard,[RFC5536][RFC2156]
Surrogate-Capability,,http,,[RFC4229]
Surrogate-Control,,http,,[RFC4229]
TCN,,http,,[RFC4229]
TE,,http,standard,"[RFC7230, Section 4.3]"
Timeout,,http,standard,[RFC4918]
To,,mail,standard,[RFC5322]
Topic,,http,standard,"[RFC8030, Section 5.4]"
Trailer,,http,standard,"[RFC7230, Section 4.4]"
Transfer-Encoding,,http,standard,"[RFC7230, Section 3.3.1]"
TTL,,http,standard,"[RFC8030, Section 5.2]"
Urgency,,http,standard,"[RFC8030, Section 5.3]"
URI,,http,,[RFC4229]
Upgrade,,http,standard,"[RFC7230, Section 6.7]"
User-Agent,,http,standard,"[RFC7231, Section 5.5.3]"
User-Agent,,netnews,standard,[RFC5536][RFC2616]
Variant-Vary,,http,,[RFC4229]
Vary,,http,standard,"[RFC7231, Section 7.1.4]"
VBR-Info,,mail,standard,[RFC5518]
Via,,http,standard,"[RFC7230, Section 5.7.1]"
WWW-Authenticate,,http,standard,"[RFC7235, Section 4.1]"
Want-Digest,,http,,[RFC4229]
Warning,,http,standard,"[RFC7234, Section 5.5]"
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]
X-Content-Type-Options,,http,standard,[https://fetch.spec.whatwg.org/#x-content-type-options-header]
X-Frame-Options,,http,informational,[RFC7034]
Xref,,netnews,standard,[RFC5536]