Internet Assigned Numbers Authority
Email Authentication Parameters
Created
2009-01-30
Last Updated
2025-04-04
Available Formats
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Registries included below
• Email Authentication Methods
• Email Authentication Result Names
• Email Authentication Property Types
Email Authentication Methods
Registration Procedure(s)
Specification Required
Expert(s)
Murray Kucherawy (primary), Scott Kitterman (secondary)
Reference
[RFC8601][RFC-ietf-dmarc-dmarcbis-41]
Available Formats
[IMG]
CSV
Method Definition ptype Property Value Status Version
arc [RFC8617, Section 6] smtp remote-ip IP address (v4 or v6) of originating SMTP connection active 1
arc [RFC8617, Section 6] header oldest-pass The instance id of the oldest validating AMS or 0 if they active 1
all pass (see [RFC8617, Section 5.2])
auth [RFC8601] smtp auth identity confirmed by the AUTH command active 1
auth [RFC8601] smtp mailfrom AUTH parameter of the SMTP MAIL command active 1
dkim [RFC8601] header d value of signature "d" tag active 1
dkim [RFC8601] header i value of signature "i" tag active 1
dkim [RFC6008] header b full or partial value of signature "b" tag active 1
dkim [RFC8601] header a value of signature "a" tag active 1
dkim [RFC8601] header s value of signature "s" tag active 1
dkim-adsp [RFC5617][RFC7601] header from contents of the [RFC-ietf-emailcore-rfc5322bis-12] From: deprecated 1
header field, with comments removed
dkim-atps [RFC6541] header from contents of the [RFC-ietf-emailcore-rfc5322bis-12] From: active 1
header field, with comments removed
dmarc [RFC-ietf-dmarc-dmarcbis-41] header from The domain portion of the active 1
[RFC-ietf-emailcore-rfc5322bis-12].From header field
The evaluated DMARC policy applied/to be applied after
dmarc [RFC-ietf-dmarc-dmarcbis-41] policy dmarc policy options have been processed. Must be "none", active 1
"quarantine", or "reject".
dnswl [RFC8904] dns zone DNSWL publicly accessible query root domain active 1
dnswl [RFC8904] policy ip type A response received (or a quoted, comma-separated active 1
list thereof)
dnswl [RFC8904] policy txt type TXT query response active 1
dnswl [RFC8904] dns sec one of "yes" for DNSSEC authenticated data, "no" for not active 1
signed, or "na" for not applicable
domainkeys [RFC7601] header d value of signature "d" tag deprecated 1
contents of the [RFC-ietf-emailcore-rfc5322bis-12] From:
domainkeys [RFC7601] header from header field, after removing comments, and removing the deprecated 1
local-part and following "@" if not authenticated
contents of the [RFC-ietf-emailcore-rfc5322bis-12]
domainkeys [RFC7601] header sender Sender: header field, after removing comments, and deprecated 1
removing the local-part and following "@" if not
authenticated
iprev [RFC8601] policy iprev client IP address active 1
rrvs [RFC7293] smtp rcptto envelope recipient active 1
sender-id [RFC7601] header name of header field value of header field used by PRA after removing comments deprecated 1
used by PRA and parts not authenticated
The MIME body part reference that contains the S/MIME
smime [RFC7281] body smime-part signature. See [Section 3.2.1 of RFC7281] for full active 1
syntax.
The email address [RFC-ietf-emailcore-rfc5322bis-12]
associated with the S/MIME signature. The email address
smime [RFC7281] body smime-identifer can be specified explicitly or derived from the identity active 1
of the signer. Note that this email address can
correspond to a countersignature.
smime [RFC7281] body smime-serial serialNumber of the certificate associated with the active 1
S/MIME signature (see Section 4.1.2.2 of [RFC5280]).
Issuer name DN (e.g., "CN=CA1,ST=BC,c=CA") of the
smime [RFC7281] body smime-issuer certificate associated with the S/MIME signature (see active 1
section 4.1.2.2 of [RFC5280]).
spf [RFC8601] smtp mailfrom envelope sender after removing parts not authenticated active 1
spf [RFC8601] smtp helo HELO/EHLO value active 1
vbr [RFC6212] header md DNS domain name used as the subject of a VBR query active 1
vbr [RFC6212] header mv DNS domain name of the entity acting as the voucher active 1
Email Authentication Result Names
Registration Procedure(s)
Specification Required
Expert(s)
Murray Kucherawy (primary), Scott Kitterman (secondary)
Reference
[RFC8601][RFC-ietf-dmarc-dmarcbis-41]
Available Formats
[IMG]
CSV
Auth Method(s) Code Specification Status
arc fail [RFC8617] section 2.2 active
arc none [RFC8617] section 2.2 active
arc pass [RFC8617] section 2.2 active
auth fail [RFC8601] section 2.7.4 active
auth none [RFC8601] section 2.7.4 active
auth pass [RFC8601] section 2.7.4 active
auth permerror [RFC8601] section 2.7.4 active
auth temperror [RFC8601] section 2.7.4 active
dkim fail [RFC8601] section 2.7.1 active
dkim neutral [RFC8601] section 2.7.1 active
dkim none [RFC8601] section 2.7.1 active
dkim pass [RFC8601] section 2.7.1 active
dkim permerror [RFC8601] section 2.7.1 active
dkim policy [RFC8601] section 2.7.1 active
dkim temperror [RFC8601] section 2.7.1 active
dkim-adsp discard [RFC7601], [RFC5617] section 5.4 deprecated
dkim-adsp fail [RFC7601], [RFC5617] section 5.4 deprecated
dkim-adsp none [RFC7601], [RFC5617] section 5.4 deprecated
dkim-adsp nxdomain [RFC7601], [RFC5617] section 5.4 deprecated
dkim-adsp pass [RFC7601], [RFC5617] section 5.4 deprecated
dkim-adsp permerror [RFC7601], [RFC5617] section 5.4 deprecated
dkim-adsp temperror [RFC7601], [RFC5617] section 5.4 deprecated
dkim-adsp unknown [RFC7601], [RFC5617] section 5.4 deprecated
dkim-atps fail [RFC6541] section 8.3 active
dkim-atps none [RFC6541] section 8.3 active
dkim-atps pass [RFC6541] section 8.3 active
dkim-atps permerror [RFC6541] section 8.3 active
dkim-atps temperror [RFC6541] section 8.3 active
dmarc fail [RFC-ietf-dmarc-dmarcbis-41] active
dmarc none [RFC-ietf-dmarc-dmarcbis-41] active
dmarc pass [RFC-ietf-dmarc-dmarcbis-41] active
dmarc permerror [RFC-ietf-dmarc-dmarcbis-41] active
dmarc temperror [RFC-ietf-dmarc-dmarcbis-41] active
dnswl none [RFC8904] active
dnswl pass [RFC8904] active
dnswl permerror [RFC8904] active
dnswl temperror [RFC8904] active
domainkeys temperror [RFC7601] section 2.7.1 deprecated
domainkeys neutral [RFC7601] section 2.7.1 deprecated
domainkeys none [RFC7601] section 2.7.1 deprecated
domainkeys permerror [RFC7601] section 2.7.1 deprecated
domainkeys policy [RFC7601] section 2.7.1 deprecated
domainkeys pass [RFC7601] section 2.7.1 deprecated
domainkeys temperror [RFC7601] section 2.7.1 deprecated
iprev fail [RFC8601] section 2.7.3 active
iprev pass [RFC8601] section 2.7.3 active
iprev permerror [RFC8601] section 2.7.3 active
iprev temperror [RFC8601] section 2.7.3 active
rrvs fail [RFC7293] section 11 active
rrvs none [RFC7293] section 11 active
rrvs pass [RFC7293] section 11 active
rrvs permerror [RFC7293] section 11 active
rrvs temperror [RFC7293] section 11 active
rrvs unknown [RFC7293] section 11 active
sender-id fail [RFC7601] section 2.7.2 deprecated
sender-id hardfail [RFC5451] section 2.4.2 deprecated
sender-id neutral [RFC7601] section 2.7.2 deprecated
sender-id none [RFC7601] section 2.7.2 deprecated
sender-id pass [RFC7601] section 2.7.2 deprecated
sender-id permerror [RFC7601] section 2.7.2 deprecated
sender-id policy [RFC7601] section 2.7.2 deprecated
sender-id softfail [RFC7601] section 2.7.2 deprecated
sender-id temperror [RFC7601] section 2.7.2 deprecated
smime fail [RFC7281] section 3.1 active
smime neutral [RFC7281] section 3.1 active
smime none [RFC7281] section 3.1 active
smime pass [RFC7281] section 3.1 active
smime permerror [RFC7281] section 3.1 active
smime policy [RFC7281] section 3.1 active
smime temperror [RFC7281] section 3.1 active
spf fail [RFC8601] section 2.7.2 active
spf hardfail [RFC5451] section 2.4.2 deprecated
spf neutral [RFC8601] section 2.7.2 active
spf none [RFC8601] section 2.7.2 active
spf pass [RFC8601] section 2.7.2 active
spf permerror [RFC8601] section 2.7.2 active
spf policy [RFC8601] section 2.7.2 active
spf softfail [RFC8601] section 2.7.2 active
spf temperror [RFC8601] section 2.7.2 active
vbr fail [RFC6212] section 4 active
vbr none [RFC6212] section 4 active
vbr pass [RFC6212] section 4 active
vbr permerror [RFC6212] section 4 active
vbr temperror [RFC6212] section 4 active
Email Authentication Property Types
Registration Procedure(s)
Expert Review
Expert(s)
Murray Kucherawy (primary), Scott Kitterman (secondary)
Reference
[RFC8601]
Available Formats
[IMG]
CSV
ptype Definition Description
body [RFC8601] section 2.3 The property being reported was found in the body of the message.
dns [RFC8904] The property being reported belongs to the Domain Name System.
header [RFC8601] section 2.3 The property being reported was found in a header field of the message.
policy [RFC8601] section 2.3 The property being reported relates to a locally-defined policy.
smtp [RFC8601] section 2.3 The property being reported is a parameter to an SMTP command used to relay the message.
Licensing Terms