Email Authentication Parameters

Created
2009-01-30
Last Updated
2026-05-22
Available Formats

XML
HTML
TXT

Registries Included Below

Email Authentication Methods

Registration Procedure(s)
Specification Required
Expert(s)
Murray Kucherawy (primary), Scott Kitterman (secondary)
Reference
[RFC 8601][RFC 9989]
Available Formats

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 all pass (see [RFC8617, Section 5.2]) active 1
auth [RFC 8601] smtp auth identity confirmed by the AUTH command active 1
auth [RFC 8601] smtp mailfrom AUTH parameter of the SMTP MAIL command active 1
dkim [RFC 8601] header d value of signature "d" tag active 1
dkim [RFC 8601] header i value of signature "i" tag active 1
dkim [RFC 6008] header b full or partial value of signature "b" tag active 1
dkim [RFC 8601] header a value of signature "a" tag active 1
dkim [RFC 8601] header s value of signature "s" tag active 1
dkim-adsp [RFC 5617][RFC 7601] header from contents of the [RFC-ietf-emailcore-rfc5322bis-12] From: header field, with comments removed deprecated 1
dkim-atps [RFC 6541] header from contents of the [RFC-ietf-emailcore-rfc5322bis-12] From: header field, with comments removed active 1
dmarc [RFC 9989] header from The domain portion of the [RFC 5322].From header field active 1
dmarc [RFC 9989] policy dmarc The evaluated DMARC policy applied / to be applied after policy options have been processed. Must be "none", "quarantine", or "reject". active 1
dnswl [RFC 8904] dns zone DNSWL publicly accessible query root domain active 1
dnswl [RFC 8904] policy ip type A response received (or a quoted, comma-separated list thereof) active 1
dnswl [RFC 8904] policy txt type TXT query response active 1
dnswl [RFC 8904] dns sec one of "yes" for DNSSEC authenticated data, "no" for not signed, or "na" for not applicable active 1
domainkeys [RFC 7601] header d value of signature "d" tag deprecated 1
domainkeys [RFC 7601] header from contents of the [RFC-ietf-emailcore-rfc5322bis-12] From: header field, after removing comments, and removing the local-part and following "@" if not authenticated deprecated 1
domainkeys [RFC 7601] header sender contents of the [RFC-ietf-emailcore-rfc5322bis-12] Sender: header field, after removing comments, and removing the local-part and following "@" if not authenticated deprecated 1
iprev [RFC 8601] policy iprev client IP address active 1
rrvs [RFC 7293] smtp rcptto envelope recipient active 1
sender-id [RFC 7601] header name of header field used by PRA value of header field used by PRA after removing comments and parts not authenticated deprecated 1
smime [RFC 7281] body smime-part The MIME body part reference that contains the S/MIME signature. See [Section 3.2.1 of RFC7281] for full syntax. active 1
smime [RFC 7281] body smime-identifer The email address [RFC-ietf-emailcore-rfc5322bis-12] associated with the S/MIME signature. The email address can be specified explicitly or derived from the identity of the signer. Note that this email address can correspond to a countersignature. active 1
smime [RFC 7281] body smime-serial serialNumber of the certificate associated with the S/MIME signature (see Section 4.1.2.2 of [RFC 5280]). active 1
smime [RFC 7281] body smime-issuer Issuer name DN (e.g., "CN=CA1,ST=BC,c=CA") of the certificate associated with the S/MIME signature (see section 4.1.2.2 of [RFC 5280]). active 1
spf [RFC 8601] smtp mailfrom envelope sender after removing parts not authenticated active 1
spf [RFC 8601] smtp helo HELO/EHLO value active 1
vbr [RFC 6212] header md DNS domain name used as the subject of a VBR query active 1
vbr [RFC 6212] 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
[RFC 8601][RFC 9989]
Available Formats

CSV
Auth Method(s) Code Specification Status
arc fail [RFC 8617] section 2.2 active
arc none [RFC 8617] section 2.2 active
arc pass [RFC 8617] section 2.2 active
auth fail [RFC 8601] section 2.7.4 active
auth none [RFC 8601] section 2.7.4 active
auth pass [RFC 8601] section 2.7.4 active
auth permerror [RFC 8601] section 2.7.4 active
auth temperror [RFC 8601] section 2.7.4 active
dkim fail [RFC 8601] section 2.7.1 active
dkim neutral [RFC 8601] section 2.7.1 active
dkim none [RFC 8601] section 2.7.1 active
dkim pass [RFC 8601] section 2.7.1 active
dkim permerror [RFC 8601] section 2.7.1 active
dkim policy [RFC 8601] section 2.7.1 active
dkim temperror [RFC 8601] section 2.7.1 active
dkim-adsp discard [RFC 7601], [RFC 5617] section 5.4 deprecated
dkim-adsp fail [RFC 7601], [RFC 5617] section 5.4 deprecated
dkim-adsp none [RFC 7601], [RFC 5617] section 5.4 deprecated
dkim-adsp nxdomain [RFC 7601], [RFC 5617] section 5.4 deprecated
dkim-adsp pass [RFC 7601], [RFC 5617] section 5.4 deprecated
dkim-adsp permerror [RFC 7601], [RFC 5617] section 5.4 deprecated
dkim-adsp temperror [RFC 7601], [RFC 5617] section 5.4 deprecated
dkim-adsp unknown [RFC 7601], [RFC 5617] section 5.4 deprecated
dkim-atps fail [RFC 6541] section 8.3 active
dkim-atps none [RFC 6541] section 8.3 active
dkim-atps pass [RFC 6541] section 8.3 active
dkim-atps permerror [RFC 6541] section 8.3 active
dkim-atps temperror [RFC 6541] section 8.3 active
dmarc fail [RFC 9989] active
dmarc none [RFC 9989] active
dmarc pass [RFC 9989] active
dmarc permerror [RFC 9989] active
dmarc temperror [RFC 9989] active
dnswl none [RFC 8904] active
dnswl pass [RFC 8904] active
dnswl permerror [RFC 8904] active
dnswl temperror [RFC 8904] active
domainkeys temperror [RFC 7601] section 2.7.1 deprecated
domainkeys neutral [RFC 7601] section 2.7.1 deprecated
domainkeys none [RFC 7601] section 2.7.1 deprecated
domainkeys permerror [RFC 7601] section 2.7.1 deprecated
domainkeys policy [RFC 7601] section 2.7.1 deprecated
domainkeys pass [RFC 7601] section 2.7.1 deprecated
domainkeys temperror [RFC 7601] section 2.7.1 deprecated
iprev fail [RFC 8601] section 2.7.3 active
iprev pass [RFC 8601] section 2.7.3 active
iprev permerror [RFC 8601] section 2.7.3 active
iprev temperror [RFC 8601] section 2.7.3 active
rrvs fail [RFC 7293] section 11 active
rrvs none [RFC 7293] section 11 active
rrvs pass [RFC 7293] section 11 active
rrvs permerror [RFC 7293] section 11 active
rrvs temperror [RFC 7293] section 11 active
rrvs unknown [RFC 7293] section 11 active
sender-id fail [RFC 7601] section 2.7.2 deprecated
sender-id hardfail [RFC 5451] section 2.4.2 deprecated
sender-id neutral [RFC 7601] section 2.7.2 deprecated
sender-id none [RFC 7601] section 2.7.2 deprecated
sender-id pass [RFC 7601] section 2.7.2 deprecated
sender-id permerror [RFC 7601] section 2.7.2 deprecated
sender-id policy [RFC 7601] section 2.7.2 deprecated
sender-id softfail [RFC 7601] section 2.7.2 deprecated
sender-id temperror [RFC 7601] section 2.7.2 deprecated
smime fail [RFC 7281] section 3.1 active
smime neutral [RFC 7281] section 3.1 active
smime none [RFC 7281] section 3.1 active
smime pass [RFC 7281] section 3.1 active
smime permerror [RFC 7281] section 3.1 active
smime policy [RFC 7281] section 3.1 active
smime temperror [RFC 7281] section 3.1 active
spf fail [RFC 8601] section 2.7.2 active
spf hardfail [RFC 5451] section 2.4.2 deprecated
spf neutral [RFC 8601] section 2.7.2 active
spf none [RFC 8601] section 2.7.2 active
spf pass [RFC 8601] section 2.7.2 active
spf permerror [RFC 8601] section 2.7.2 active
spf policy [RFC 8601] section 2.7.2 active
spf softfail [RFC 8601] section 2.7.2 active
spf temperror [RFC 8601] section 2.7.2 active
vbr fail [RFC 6212] section 4 active
vbr none [RFC 6212] section 4 active
vbr pass [RFC 6212] section 4 active
vbr permerror [RFC 6212] section 4 active
vbr temperror [RFC 6212] section 4 active

Email Authentication Property Types

Registration Procedure(s)
Expert Review
Expert(s)
Murray Kucherawy (primary), Scott Kitterman (secondary)
Reference
[RFC 8601]
Available Formats

CSV
ptype Definition Description
body [RFC 8601] section 2.3 The property being reported was found in the body of the message.
dns [RFC 8904] The property being reported belongs to the Domain Name System.
header [RFC 8601] section 2.3 The property being reported was found in a header field of the message.
policy [RFC 8601] section 2.3 The property being reported relates to a locally-defined policy.
smtp [RFC 8601] section 2.3 The property being reported is a parameter to an SMTP command used to relay the message.