fastmail

v1.1.0

Fastmail email skills: browser-driven email workflows (search, read, compose, reply) and sending-identity management via the fastmail-actions workflows.

Claude CodeAgent Plugins3 Skills

By Adam Daniel0 GitHub starsUpdated 1 hour ago

Directory evidence

Runtimes: Claude Code and Agent Plugins
Parsed components: 3 skill or MCP entries
Source updated: Sep 24, 2026
Manifest status: Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install fastmail for Claude Code

Installs for the current user

claude plugin marketplace add IchenDEV/agent-plugin-mkt
claude plugin marketplace update agent-plugin-marketplace
claude plugin install fastmail@agent-plugin-marketplace

Paste and run these commands in a terminal with Claude Code. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually

$ git clone https://github.com/Adam-S-Daniel/agentskills

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/fastmail/.

Plugin files

plugins/fastmail/

├── .claude-plugin/plugin.json
├── plugin.json
├── skills/add-from-address/SKILL.md
├── skills/add-received-from-addresses/SKILL.md
└── skills/fastmail/SKILL.md

Included Skills3

add-from-addressskills/add-from-address/SKILL.md

Add one or more email addresses to a Fastmail account as selectable "From" (sending) identities by triggering the add-from-address GitHub Actions workflow in the Adam-S-Daniel/fastmail-actions repo (which does the JMAP work with the FASTMAIL_API_TOKEN repo secret). Trigger when the user wants to "add a from address", "add a sending identity", "let me send as X", "add an alias I can send from", or "register a new From address in Fastmail". Supports a dry-run (whatif) preview. For discovering which received alias addresses are worth adding, use the add-received-from-addresses skill instead.

add-received-from-addressesskills/add-received-from-addresses/SKILL.md

Discover which of a Fastmail account's own alias addresses are worth being able to send from, and add them as "From" identities, by triggering the add-received-from-addresses GitHub Actions workflow in the Adam-S-Daniel/fastmail-actions repo (which does the JMAP work with the FASTMAIL_API_TOKEN repo secret). It scans every message for distinct X-Delivered-To addresses, keeps only those you actually correspond through, drops any that are already identities, and adds the rest. Trigger when the user wants to "add From addresses for aliases I actually use", "find alias addresses worth sending from", or "set up identities for the addresses that receive my mail". Supports a dry-run (whatif) preview. To add a specific known address, use the add-from-address skill instead.

fastmailskills/fastmail/SKILL.md

Automate Fastmail email workflows via a local browser session. Use this skill ONLY when running on Adam's computer with access to his browser (e.g. via Claude desktop / Cowork mode with Claude in Chrome). Do NOT use in headless environments such as the Claude Code CLI, CI pipelines, or any context without an interactive browser available. Trigger when the user wants to: search Fastmail for emails by sender, subject, or keyword; read email threads or attachment contents (including spreadsheets); compose and send new messages; or draft and send replies. Trigger on any mention of "Fastmail", "check my email", "search my inbox", "reply to", or similar email-management requests.

Plugin manifests2

plugins/fastmail/.claude-plugin/plugin.json

{
  "name": "fastmail",
  "version": "1.1.0",
  "description": "Fastmail email skills: browser-driven email workflows (search, read, compose, reply) and sending-identity management via the fastmail-actions workflows.",
  "author": {
    "name": "Adam Daniel"
  }
}

plugins/fastmail/plugin.json

{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "fastmail",
  "version": "1.1.0",
  "description": "Fastmail email skills: browser-driven email workflows (search, read, compose, reply) and sending-identity management via the fastmail-actions workflows.",
  "author": {
    "name": "Adam Daniel"
  },
  "repository": "https://github.com/Adam-S-Daniel/agentskills",
  "keywords": [
    "fastmail",
    "email",
    "jmap",
    "identities",
    "from-address",
    "browser",
    "claude-in-chrome"
  ]
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[fastmail on Agent Plugins Marketplace](https://pluginsmp.com/plugins/fastmail)