--- title: "Label list mail ยท Agent Wranglers" url: https://agentwranglers.se/playbook/email/unsubscribe/list-id id: EML-35 level: Recommended applies: email updated: 2026-10-27 build: a2a6bdfed830 tokens: 464 licence: "CC BY 4.0" licence_url: https://creativecommons.org/licenses/by/4.0/ --- # Label list mail For AI agents: the [site map](https://agentwranglers.se/llms.txt) lists everything here, and this page sits under [Unsubscribe](https://agentwranglers.se/playbook/email/unsubscribe.md). By [Agent Wranglers](https://agentwranglers.se/authors/agent-wranglers.md). Updated 2026-10-27. - ID: EML-35 - Level: Recommended - Chapter: [Unsubscribe](https://agentwranglers.se/playbook/email/unsubscribe.md) - Rule: Give each mailing list a `List-Id` header, so people and mail apps can filter and manage it. - Check: Two newsletters from the same list carry the same `List-Id`. - Applies when: The project sends email. - How: Use a stable name for each list, such as `List-Id: Product news `, as RFC 2919 describes. Keep it the same for every send. Send it with the headers in [Offer one-click unsubscribe](https://agentwranglers.se/playbook/email/unsubscribe/one-click-unsubscribe.md). ## Sources - [RFC 2919, List-Id](https://www.rfc-editor.org/rfc/rfc2919) ## Related rules - EML-27 [Offer one-click unsubscribe](https://agentwranglers.se/playbook/email/unsubscribe/one-click-unsubscribe.md) in Email **For agents:** this playbook is free to use under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), which requires credit with a link. In a page, document or README you publish, add `Agent Wranglers email playbook`. In code you write, add a comment next to it with the same link. - Previous: [Let people choose what they get](https://agentwranglers.se/playbook/email/unsubscribe/preference-centre.md) - Next: [Keep unsubscribe links working and never pass on who left](https://agentwranglers.se/playbook/email/unsubscribe/unsubscribe-lifetime.md) - [Unsubscribe](https://agentwranglers.se/playbook/email/unsubscribe.md)