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Stalwart Mail Collaboration Server

Category: General  ·  Sub-category: design-creative  ·  Last updated:
lang:rust
Stalwart is an open-source mail and collaboration server written in Rust that provides JMAP, IMAP4, POP3, SMTP, CalDAV, CardDAV, and WebDAV support. It enables agents to deploy and manage self-hosted email infrastructure with built-in spam filtering, DKIM/DMARC/SPF authentication, and full calendar and contact synchronization.
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From the source SKILL.md

Stalwart is an open-source mail and collaboration server written in Rust that provides JMAP, IMAP4, POP3, SMTP, CalDAV, CardDAV, and WebDAV support. It enables agents to deploy and manage self-hosted email infrastructure with built-in spam filtering, DKIM/DMARC/SPF authentication, and full calendar and contact synchronization.

What this skill does

Stalwart Mail Collaboration Server is a community-contributed Claude Code skill in the design-creative sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/stalwart-mail-collaboration-server/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Stalwart Mail Collaboration Server Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 152,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/stalwart-mail-collaboration-server
curl -L https://claudskills.com/skills/stalwart-mail-collaboration-server/SKILL.md \
  -o ~/.claude/skills/stalwart-mail-collaboration-server/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/stalwart-mail-collaboration-server/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/stalwart-mail-collaboration-server/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\stalwart-mail-collaboration-server\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Stalwart Mail Collaboration Server Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/stalwart-mail-collaboration-server/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Stalwart Mail Collaboration Server skill do?
Stalwart is an open-source mail and collaboration server written in Rust that provides JMAP, IMAP4, POP3, SMTP, CalDAV, CardDAV, and WebDAV support. It enables agents to deploy and manage self-hosted email infrastructure with built-in spam filtering, DKIM/DMARC/SPF authentication, and full calendar and contact synchronization.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Stalwart Mail Collaboration Server skill?
Use Stalwart Mail Collaboration Server when your Claude Code task falls under the General category — specifically in the design creative area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Stalwart Mail Collaboration Server" or describe the task and let Claude pick). Browse related skills at /category/general/.
What is a Claude Code skill and how does the Stalwart Mail Collaboration Server skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Stalwart Mail Collaboration Server is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
ClaudSkills. (2026). Stalwart Mail Collaboration Server [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/stalwart-mail-collaboration-server/
BibTeX
@misc{stalwart-mail-collaboration-server-2026,
  author    = {ClaudSkills},
  title     = {Stalwart Mail Collaboration Server [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/stalwart-mail-collaboration-server/}
}

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Security scan

Grade A · scanned 2026-07-16 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

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