{"id":51163463,"url":"https://github.com/castle/disposable-email-domains","last_synced_at":"2026-06-26T16:30:29.383Z","repository":{"id":357154994,"uuid":"1235403101","full_name":"castle/disposable-email-domains","owner":"castle","description":"A curated list of the 1,000 most active disposable email domains, updated daily.","archived":false,"fork":false,"pushed_at":"2026-06-23T06:01:16.000Z","size":285,"stargazers_count":43,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"master","last_synced_at":"2026-06-23T08:05:02.092Z","etag":null,"topics":["antibot","antispam","blocklist","disposable-email","email","filter","temporary-email"],"latest_commit_sha":null,"homepage":"https://castle.io/research/","language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/castle.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-05-11T09:40:27.000Z","updated_at":"2026-06-23T06:01:20.000Z","dependencies_parsed_at":null,"dependency_job_id":"a8c9a060-ede0-4433-b62f-73065b30ae21","html_url":"https://github.com/castle/disposable-email-domains","commit_stats":null,"previous_names":["castle/disposable-email-domains"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/castle/disposable-email-domains","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/castle%2Fdisposable-email-domains","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/castle%2Fdisposable-email-domains/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/castle%2Fdisposable-email-domains/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/castle%2Fdisposable-email-domains/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/castle","download_url":"https://codeload.github.com/castle/disposable-email-domains/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/castle%2Fdisposable-email-domains/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":34825609,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-06-26T02:00:06.560Z","response_time":106,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["antibot","antispam","blocklist","disposable-email","email","filter","temporary-email"],"created_at":"2026-06-26T16:30:28.613Z","updated_at":"2026-06-26T16:30:29.375Z","avatar_url":"https://github.com/castle.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"# Disposable email domains\n\nA curated list of the top 1,000 disposable email domains, updated daily.\n\nMaintained by [Castle's research team](https://castle.io/research/).\n\n## Why this list exists\n\nThere are already many public disposable email domain lists. Most are community-maintained, updated through pull requests, and gradually grow into large catch-all datasets mixing:\n\n- Disposable email providers\n- Privacy-focused email services\n- Custom domains with unclear ownership\n\nThat creates two common problems:\n\n1. False positives when used for blocking\n2. Large noisy lists that are difficult to operationalize\n\nWe built this repository with a different philosophy.\n\n- **Updated daily.** Fully automated pipeline, no dependency on community submissions.\n- **Curated, not aggregated.** We do not import domains from public lists. Every domain is independently verified and tied to a real disposable email service.\n- **Strictly disposable.** We intentionally exclude privacy-oriented providers such as Proton Mail or Tuta. Their primary purpose is privacy, not throwaway account creation.\n- **Observed in real abuse.** These domains are actively used in fake signups, promo abuse, spam, multi-accounting, and other attacks observed across Castle's network.\n- **Small and focused.** Only 1,000 domains. Smaller lists are easier to maintain, faster to query, and less likely to generate false positives.\n\nIf a domain is included here, there is a strong reason for it.\n\n## How we collect domains\n\nWe combine passive and active collection techniques.\n\n### Website scraping\n\nWe continuously scrape known disposable email provider websites to identify the domains they serve.\n\nNew providers appear regularly, often exposing large pools of rotating domains.\n\n### DNS analysis\n\nWe analyze DNS records such as MX and A records to identify domains sharing infrastructure with known disposable email services.\n\nThis helps uncover:\n\n- White-label disposable email services\n- Hidden custom domains\n- Disposable domains absent from public lists\n\n### Real-world abuse telemetry\n\nCastle protects large consumer platforms against fraud and bot attacks.\n\nDomains are ranked based on observed abuse activity across Castle's network, including:\n\n- Fake account creation\n- Multi-accounting\n- Promo abuse\n- Spam campaigns\n\nThe result is a dataset that reflects current abuse patterns.\n\n## Repository contents\n\n### Main list\n\n```text\ndisposable-email-domains.txt\n```\n\nPlain text format:\n\n```text\nexample-disposable.com\ntempmail.net\nthrowaway.email\n```\n\n- One domain per line\n- Sorted by observed abuse volume\n- Most frequently abused domains first\n\n## Usage\n\nFetch the latest version directly from GitHub:\n\n```bash\ncurl -sL https://raw.githubusercontent.com/castle/disposable-email-domains/master/disposable-email-domains.txt\n```\n\nThe dataset is intentionally small enough to load entirely into memory.\n\n### Example (Python)\n\n```python\nimport urllib.request\n\nURL = \"https://raw.githubusercontent.com/castle/disposable-email-domains/master/disposable-email-domains.txt\"\n\ndisposable_domains = set(\n    urllib.request.urlopen(URL)\n    .read()\n    .decode()\n    .splitlines()\n)\n\ndef is_disposable(email: str) -\u003e bool:\n    domain = email.rsplit(\"@\", 1)[-1].lower()\n    return domain in disposable_domains\n```\n\n### Example (JavaScript / Node.js)\n\n```javascript\nconst response = await fetch(\n  \"https://raw.githubusercontent.com/castle/disposable-email-domains/master/disposable-email-domains.txt\"\n);\n\nconst text = await response.text();\n\nconst disposableDomains = new Set(\n  text.split(\"\\n\").map(d =\u003e d.trim()).filter(Boolean)\n);\n\nfunction isDisposable(email) {\n  const domain = email.split(\"@\").pop().toLowerCase();\n  return disposableDomains.has(domain);\n}\n```\n\n## What this list is not\n\n### Not exhaustive\n\nThis repository only contains the top 1,000 disposable email domains currently observed in abuse activity.\n\nCastle's internal dataset is significantly larger and continuously evolving.\n\nIf you need broader coverage, see the [Castle API](https://docs.castle.io/).\n\n### Not a blocking recommendation\n\nHow you use this data is up to you.\n\nDifferent teams use disposable email signals differently:\n\n- Hard blocking\n- Risk scoring\n- Step-up verification\n- Rate limiting\n- Manual review\n\nDisposable email usage alone is not always malicious.\n\n## Updates\n\nThe list is regenerated automatically every day and committed through an automated pipeline.\n\n## License\n\nMIT\n\n## Links\n\n- [Castle](https://castle.io/) - Account security and fraud prevention\n- [Castle Research](https://castle.io/research/) - Threat research and technical articles\n- [Castle Docs](https://docs.castle.io/) - API and product documentation","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcastle%2Fdisposable-email-domains","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fcastle%2Fdisposable-email-domains","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcastle%2Fdisposable-email-domains/lists"}