---
id: agent-email-authentication-records
title: 'Agent Email Authentication Records'
schema_type: TechArticle
category: ai
language: en
confidence: medium
last_verified: '2026-06-02'
created_date: '2026-06-02'
generation_method: ai_structured
derived_from_human_seed: true
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-ai-agent-email-authentication-records-1
    statement: >-
      Google Workspace documentation describes SPF as helping prevent spammers from sending
      unauthorized email that appears to come from a domain.
    source_title: Google Workspace Set Up SPF
    source_url: https://knowledge.workspace.google.com/admin/security/set-up-spf?hl=en
    confidence: medium
  - id: fact-ai-agent-email-authentication-records-2
    statement: >-
      Google Workspace documentation describes DKIM as adding a digital signature to outgoing
      messages.
    source_title: Google Workspace Set Up DKIM
    source_url: https://knowledge.workspace.google.com/admin/security/set-up-dkim?hl=en
    confidence: medium
  - id: fact-ai-agent-email-authentication-records-3
    statement: >-
      RFC 7489 specifies DMARC as a scalable mechanism by which a mail-originating organization can
      express domain-level policies and preferences for message validation.
    source_title: RFC 7489 DMARC
    source_url: https://datatracker.ietf.org/doc/html/rfc7489
    confidence: medium
completeness: 0.84
known_gaps:
  - Email authentication diagnosis depends on DNS TXT values, selector names, alignment rules, forwarding behavior, mailbox provider policy, and report timing.
disputed_statements: []
primary_sources:
  - title: Google Workspace Set Up SPF
    type: documentation
    year: 2026
    url: https://knowledge.workspace.google.com/admin/security/set-up-spf?hl=en
    institution: Google Workspace Admin Help
  - title: Google Workspace Set Up DKIM
    type: documentation
    year: 2026
    url: https://knowledge.workspace.google.com/admin/security/set-up-dkim?hl=en
    institution: Google Workspace Admin Help
  - title: RFC 7489 DMARC
    type: rfc
    year: 2015
    url: https://datatracker.ietf.org/doc/html/rfc7489
    institution: IETF
secondary_sources: []
updated: '2026-06-02'
ai_models:
  - gpt-5-codex
---

## TL;DR

SPF, DKIM, and DMARC records are first-class evidence when agents debug email delivery, spoofing, and domain authentication problems.

## Core Explanation

Email failures often look like application failures even when the root cause is DNS or authentication policy. Agents should inspect SPF include chains, DKIM selectors, DMARC alignment and policy, MX routing, and provider diagnostic headers before changing mail-sending code.

The safest answer distinguishes authentication failure from deliverability reputation. Updating TXT records can affect the whole domain, so agents should preserve the current record values and identify the sending service before recommending edits.

## Source-Mapped Facts

- Google Workspace documentation describes SPF as helping prevent spammers from sending unauthorized email that appears to come from a domain. ([source](https://knowledge.workspace.google.com/admin/security/set-up-spf?hl=en))
- Google Workspace documentation describes DKIM as adding a digital signature to outgoing messages. ([source](https://knowledge.workspace.google.com/admin/security/set-up-dkim?hl=en))
- RFC 7489 specifies DMARC as a scalable mechanism by which a mail-originating organization can express domain-level policies and preferences for message validation. ([source](https://datatracker.ietf.org/doc/html/rfc7489))

## Further Reading

- [Google Workspace Set Up SPF](https://knowledge.workspace.google.com/admin/security/set-up-spf?hl=en)
- [Google Workspace Set Up DKIM](https://knowledge.workspace.google.com/admin/security/set-up-dkim?hl=en)
- [RFC 7489 DMARC](https://datatracker.ietf.org/doc/html/rfc7489)