{"id":"756acb6c-eede-4a92-a82a-f768cbe35434","shortId":"xqvu3p","kind":"skill","title":"Mailspring Open Source Email Client with Plugin Architecture","tagline":"Mailspring is a beautiful, fast, and fully open source email client for Mac, Windows, and Linux. Built on Electron and React with a C++ sync engine, it supports unified inbox, snooze, send later, mail rules, and templates with a powerful plugin system.","description":"# Mailspring Open Source Email Client with Plugin Architecture\n\nMailspring is a beautiful, fast, and fully open source email client for Mac, Windows, and Linux. Built on Electron and React with a C++ sync engine, it supports unified inbox, snooze, send later, mail rules, and templates with a powerful plugin system.\n\n## Installation\n\nUse the upstream install or setup path that matches your environment:\n- npm install\n- npm start\n- npm start -- --help\n- npm run-script build\n\nBasic usage or getting-started notes:\n- profiles. **All of these features run in the client - Mailspring does not send\n- To install all dependencies and run Mailspring from its source code,\n- run the following commands from the root directory of the Mailspring repository:\n\n- Source: https://github.com/Foundry376/Mailspring\n- Extracted from upstream docs: https://raw.githubusercontent.com/Foundry376/Mailspring/HEAD/README.md\n\n## Source\n\n- [Agent Skill Exchange](https://agentskillexchange.com/skills/mailspring-open-source-email-client-plugin-architecture/)","tags":["mailspring","open","source","email","client","plugin","architecture","skills","agentskillexchange","agent-skills","ai-agents","ai-tools"],"capabilities":["skill","source-agentskillexchange","skill-mailspring-open-source-email-client-plugin-architecture","topic-agent-skills","topic-ai-agents","topic-ai-tools","topic-awesome-list","topic-claude-code","topic-codex","topic-cursor","topic-llm","topic-mcp","topic-npx-skills","topic-openclaw","topic-skills-catalog"],"categories":["skills"],"synonyms":[],"warnings":[],"endpointUrl":"https://skills.sh/agentskillexchange/skills/mailspring-open-source-email-client-plugin-architecture","protocol":"skill","transport":"skills-sh","auth":{"type":"none","details":{"cli":"npx skills add agentskillexchange/skills","source_repo":"https://github.com/agentskillexchange/skills","install_from":"skills.sh"}},"qualityScore":"0.454","qualityRationale":"deterministic score 0.45 from registry signals: · indexed on github topic:agent-skills · 8 github stars · SKILL.md body (1,037 chars)","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"deterministic:skill-github:v1","enrichmentVersion":1,"enrichedAt":"2026-05-18T19:11:14.759Z","embedding":null,"createdAt":"2026-05-18T13:17:38.962Z","updatedAt":"2026-05-18T19:11:14.759Z","lastSeenAt":"2026-05-18T19:11:14.759Z","tsv":"'/foundry376/mailspring':171 '/foundry376/mailspring/head/readme.md':178 '/skills/mailspring-open-source-email-client-plugin-architecture/)':185 'agent':180 'agentskillexchange.com':184 'agentskillexchange.com/skills/mailspring-open-source-email-client-plugin-architecture/)':183 'architectur':8,58 'basic':125 'beauti':12,62 'build':124 'built':25,75 'c':32,82 'client':5,19,55,69,140 'code':155 'command':159 'depend':148 'directori':163 'doc':175 'electron':27,77 'email':4,18,54,68 'engin':34,84 'environ':112 'exchang':182 'extract':172 'fast':13,63 'featur':136 'follow':158 'fulli':15,65 'get':129 'getting-start':128 'github.com':170 'github.com/foundry376/mailspring':169 'help':119 'inbox':38,88 'instal':101,105,114,146 'later':41,91 'linux':24,74 'mac':21,71 'mail':42,92 'mailspr':1,9,51,59,141,151,166 'match':110 'note':131 'npm':113,115,117,120 'open':2,16,52,66 'path':108 'plugin':7,49,57,99 'power':48,98 'profil':132 'raw.githubusercontent.com':177 'raw.githubusercontent.com/foundry376/mailspring/head/readme.md':176 'react':29,79 'repositori':167 'root':162 'rule':43,93 'run':122,137,150,156 'run-script':121 'script':123 'send':40,90,144 'setup':107 'skill':181 'skill-mailspring-open-source-email-client-plugin-architecture' 'snooz':39,89 'sourc':3,17,53,67,154,168,179 'source-agentskillexchange' 'start':116,118,130 'support':36,86 'sync':33,83 'system':50,100 'templat':45,95 'topic-agent-skills' 'topic-ai-agents' 'topic-ai-tools' 'topic-awesome-list' 'topic-claude-code' 'topic-codex' 'topic-cursor' 'topic-llm' 'topic-mcp' 'topic-npx-skills' 'topic-openclaw' 'topic-skills-catalog' 'unifi':37,87 'upstream':104,174 'usag':126 'use':102 'window':22,72","prices":[{"id":"76bc8b1b-21fd-4392-82b5-f3e03257c5e4","listingId":"756acb6c-eede-4a92-a82a-f768cbe35434","amountUsd":"0","unit":"free","nativeCurrency":null,"nativeAmount":null,"chain":null,"payTo":null,"paymentMethod":"skill-free","isPrimary":true,"details":{"org":"agentskillexchange","category":"skills","install_from":"skills.sh"},"createdAt":"2026-05-18T13:17:38.962Z"}],"sources":[{"listingId":"756acb6c-eede-4a92-a82a-f768cbe35434","source":"github","sourceId":"agentskillexchange/skills/mailspring-open-source-email-client-plugin-architecture","sourceUrl":"https://github.com/agentskillexchange/skills/tree/main/skills/mailspring-open-source-email-client-plugin-architecture","isPrimary":false,"firstSeenAt":"2026-05-18T13:17:38.962Z","lastSeenAt":"2026-05-18T19:11:14.759Z"}],"details":{"listingId":"756acb6c-eede-4a92-a82a-f768cbe35434","quickStartSnippet":null,"exampleRequest":null,"exampleResponse":null,"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[],"useCases":[],"bestFor":[],"notFor":[],"kindDetails":{"org":"agentskillexchange","slug":"mailspring-open-source-email-client-plugin-architecture","github":{"repo":"agentskillexchange/skills","stars":8,"topics":["agent-skills","ai-agents","ai-tools","awesome-list","claude-code","codex","cursor","llm","mcp","npx-skills","openclaw","skills-catalog"],"license":"mit","html_url":"https://github.com/agentskillexchange/skills","pushed_at":"2026-05-18T19:02:17Z","description":"The open catalog of AI agent skills — 2,000+ security-scanned skills for Claude Code, Cursor, Codex, and more.","skill_md_sha":"55a5fe22b188f061dcb25853e1abf644ef3432e8","skill_md_path":"skills/mailspring-open-source-email-client-plugin-architecture/SKILL.md","default_branch":"main","skill_tree_url":"https://github.com/agentskillexchange/skills/tree/main/skills/mailspring-open-source-email-client-plugin-architecture"},"layout":"multi","source":"github","category":"skills","frontmatter":{"name":"Mailspring Open Source Email Client with Plugin Architecture","description":"Mailspring is a beautiful, fast, and fully open source email client for Mac, Windows, and Linux. Built on Electron and React with a C++ sync engine, it supports unified inbox, snooze, send later, mail rules, and templates with a powerful plugin system."},"skills_sh_url":"https://skills.sh/agentskillexchange/skills/mailspring-open-source-email-client-plugin-architecture"},"updatedAt":"2026-05-18T19:11:14.759Z"}}