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Email deliverability subagent (SPF, DKIM, DMARC) v1.0.0

Use this resource to set up email authentication or diagnose a deliverability problem

New

  • 324 downloads
  • 95 likes
  • 51 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install email-deliverability-subagent

First time: connect the CLI with

npx --yes palatekit@latest login

Claude Code hands this subagent SPF, DKIM and DMARC setup, the integration of a transactional or marketing email provider, and the diagnosis of mail that does not reach the inbox. It also checks bounce rates, complaint rates and blocklists.

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Updated November 2, 2026

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Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • The subagent file (in English): checklist, SPF, DKIM and DMARC steps, bounce and complaint thresholds
  • A description that says when the main agent should call it

Good fit for

  • A sending domain that lands in spam after launch
  • A move to a new email provider

Not for

    Tags

    • email
    • dmarc
    • deliverability
    • dns

    About

    You say

    “Our confirmation emails land in spam. Check our DNS setup.”

    Card for “Email deliverability subagent (SPF, DKIM, DMARC)”

    Subagent published by VoltAgent under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Copy the file into .claude/agents/ (project) or ~/.claude/agents/ (all your projects)
    2. Ask your agent to set up email authentication or diagnose a deliverability problem, or call the subagent by name
    3. Review its work

    Content preview

    Files

    • email-deliverability-subagent.md7.5 KB
    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB

    Origin and licence

    Listed unmodified

    Author
    VoltAgent
    Source
    github.com/VoltAgent/awesome-claude-code-subagents/blob/f2e2ea7e0202cc05fa2d469fcb2c57fe08603450/categories/07-specialized-domains/email-deliverability-engineer.md
    Licence
    MIT

    Notice

    « email-deliverability-engineer » (VoltAgent, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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