https://tenvio.email

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  "markdown": "Transactional email infrastructure\n\n## Transactional email infrastructure for SaaS products and platforms.\n\nSend product email from your own domains—or organize customer-owned domains and senders under one account—with a focused REST API, explicit DNS readiness, durable queues, retries, and delivery history.\n\nControlled onboarding · Critical, transactional, and approved permission-based traffic.\n\n**POST** /v1/emails202 Accepted\n\n{\n  \"from\": \"[email protected]\",\n  \"to\": \\[\"[email protected]\"\\],\n  \"type\": \"critical\",\n  \"subject\": \"New sign-in detected\",\n  \"content\": { \"plain\": \"Review this activity.\" }\n}\n\nem\\_7kR4…queueddurably accepted\n\nOne infrastructure layer\n\n## Two ways to build on Tenvio.\n\nUse the same account-level model whether email belongs to your own product or to the businesses your platform serves.\n\n01\n\n### For your own product\n\nOperate multiple product domains and sender identities for authentication, billing, security, and workflow notifications.\n\nyour appdomainssenders\n\n02\n\n### For your platform\n\nProvision customer-owned domains and senders programmatically with scoped Management API credentials and stable external IDs.\n\nyour platformcustomer domainssenders\n\nThe SMTP problem\n\n## A successful API call is only the start.\n\nTransactional mail crosses DNS, queues, retries, transport policy, and recipient infrastructure. Treating that path as a black box leaves product teams guessing when users are waiting.\n\n**Before**Request accepted?\n\n**With Tenvio**queuedsendingaccepted\n\nExplicit state, SMTP outcomes, safe diagnostics, and timestamps—without claiming inbox placement.\n\nDomains are first-class\n\n## One account. Multiple sending identities.\n\nAdd domains independently, follow the exact DNS records each one needs, and attach multiple senders to the right domain. A sender’s effective state follows its own configuration and its domain’s readiness.\n\n-   2 domains on the Free plan\n-   3 senders per account\n-   Up to 3 senders per domain\n-   Independent domain and sender state\n\nDOMAINS**2 of 2 used**\n\nA\n\n**acme.app**3 senders · checked 2 min ago\n\nReady\n\nC\n\n**customer.example**1 sender · DNS action required\n\nVerifying\n\nDNS READINESS · CUSTOMER.EXAMPLE**2 of 3 checks passing**\n\nOwnership`_tenvio-verification`**Passed**\n\nDKIM`tenvio1._domainkey`**Pending**\n\nDMARC`_dmarc`**Passed**\n\nACCOUNT**Your SaaS platform**shared quota + scoped keys\n\nDOMAIN**customer-a.com**ready\n\nbilling@alerts@\n\nDOMAIN**customer-b.io**verifying\n\nnotifications@\n\nFor platforms\n\n## A resource model built beyond one domain.\n\nThe multi-domain, multi-sender foundation is live. It can represent domains your company owns or domains your customers own without legacy single-domain branches.\n\nManagement API**Live · controlled onboarding**\n\nCreate separate `mg_live_` keys with exact scopes for account and usage reads, plus domain and sender operations. DNS actions use the domain scopes. Sending remains isolated behind `tv_live_` keys.\n\n[Read the Management API guide](https://docs.tenvio.email/management/)\n\nDirect delivery\n\n## Your application to the recipient MX.\n\nTenvio operates the delivery path instead of forwarding sends to another email API provider.\n\n01**Your application**Authenticated API request\n\n02**Tenvio queue**Durable intake + idempotency\n\n03**Delivery engine**Policy + retries\n\n04**Recipient MX**SMTP outcome\n\nA deliberate boundary\n\n## Product email with explicit consent.\n\nCritical and transactional messages are available to every plan. Permission-based broadcast requires a paid Custom plan and separate manual approval.\n\n### Available\n\n-   Verification and authentication\n-   Security and account alerts\n-   Receipts and order updates\n-   Approved permission-based broadcast\n\n### Prohibited\n\n-   Cold outreach\n-   Purchased recipient lists\n-   Traffic without documented consent\n\nDelivery lifecycle\n\n## Every state means something precise.\n\n**queued**\n\nDurably accepted for delivery.\n\n**sending**\n\nAn attempt is in progress.\n\n**deferred**\n\nA temporary failure will retry.\n\n**accepted**\n\nThe recipient SMTP server accepted it.\n\n**bounced**\n\nThe recipient server rejected it permanently.\n\n**failed**\n\nDelivery ended without acceptance.\n\nAccepted does not guarantee inbox placement. The receiving system controls filtering and final presentation.\n\nDeveloper API\n\n## One explicit send contract.\n\nCreate an API key, keep it server-side, and send through the live REST endpoint. Every logical email requires an idempotency key so retries do not create duplicate messages.\n\n**POST**Enqueue an email\n\n**GET**List email history\n\n**GET**Inspect email detail\n\n[Read the complete API reference](https://docs.tenvio.email/)\n\nSend a transactional email\n\n```\ncurl -X POST https://api.tenvio.email/v1/emails \\\n  -H \"Authorization: Bearer YOUR_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -H \"Idempotency-Key: 7f4d9b98-63a8-4c43-a958-41d641fe2fd2\" \\\n  -d '{\n    \"from\": \"[email protected]\",\n    \"to\": [\"[email protected]\"],\n    \"cc\": [],\n    \"bcc\": [],\n    \"type\": \"transactional\",\n    \"subject\": \"Your account is ready\",\n    \"content\": { \"plain\": \"You can now sign in.\" }\n  }'\n```\n\nScale with guardrails\n\n## Clear limits. Account-level control.\n\nFree includes exact recipient-email quotas and safety limits. Purchased Custom capacity remains subject to abuse, reputation, and infrastructure safety restrictions.\n\n**2**domains\n\n**3**senders\n\n**3**senders / domain\n\n**3,000**recipient-emails / monthly cycle\n\n**250**active delivery jobs\n\nAlso enforced on Free: 30 recipient-emails per rolling minute, 300 per hour, and 300 per rolling 24 hours.\n\nPricing v1\n\n## Free and Custom.\n\nExact USD monthly pricing. Taxes may be additional where applicable.\n\nFREE\n\n### $0 / month\n\nCritical and transactional REST API email: 3,000 recipient-emails per monthly cycle, 2 domains, 3 senders total and per domain, one sending key, 250 active deliveries, and 14-day history. Broadcast is disabled.\n\nCUSTOM\n\n### From $10 / month\n\nChoose 10,000 to 2,500,000 recipient-emails and capacity for up to 10–1,000 managed domains. Hard Cap is the only exhaustion mode. Permission-based broadcast requires separate manual approval.\n\n[Build and review exact pricing](https://docs.tenvio.email/plans/)\n\nControlled onboarding\n\n## A focused product email surface.\n\n### Available\n\n-   Critical and transactional REST Email API\n-   Multiple domains and senders\n-   BCC input with address-private history\n-   Approved Custom permission-based broadcast\n-   Free and Custom Hard Cap plans\n\n### Policy boundary\n\n-   Explicit recipient permission\n-   Documented audience source\n-   No cold outreach\n-   No purchased lists\n\nFAQ\n\n## The infrastructure, without the ambiguity.\n\n**What is Tenvio?**\n\nTenvio is product email infrastructure for critical, transactional, and separately approved permission-based broadcast traffic.\n\n**Can one account use multiple domains and senders?**\n\nYes. The Free plan supports 2 domains and 3 senders across the account, with up to 3 senders on one domain.\n\n**Does “accepted” mean delivered to the inbox?**\n\nNo. It means the recipient mail server accepted the message. The receiving system controls filtering and inbox placement.\n\n**How is broadcast enabled?**\n\nA paid Custom plan is necessary but not sufficient. Tenvio separately reviews permission and risk controls before an operator approves broadcast capability. Payment never grants approval.\n\n**Can I use a purchased list or send cold outreach?**\n\nNo. Both are prohibited. Broadcast recipients require a documented permission basis and audience source.\n\nRequest access\n\n## Tell us what your product needs to send.\n\nTenvio is onboarding SaaS products and platforms during controlled onboarding. Share your domain model, transactional use case, and expected volume.\n\n**Keep secrets out of this form.**Do not include API keys, passwords, recipient lists, or message payloads.\n",
  "fullPageMarkdown": "Tenvio - Transactional Email API for SaaS Platforms         [Skip to content](https://tenvio.email/#main)\n\n[![](https://tenvio.email/brand-mark.png)Tenvio](https://tenvio.email/)\n\nTransactional email infrastructure# Transactional email infrastructure for SaaS products and platforms.\n\nSend product email from your own domains—or organize customer-owned domains and senders under one account—with a focused REST API, explicit DNS readiness, durable queues, retries, and delivery history.\n\n[Request access →](https://tenvio.email/?topic=access#request-access)[Read the docs](https://docs.tenvio.email/)\n\nControlled onboarding · Critical, transactional, and approved permission-based traffic.\n\nSend API LivePlatform Controlled onboarding\n\n**POST** /v1/emails202 Accepted\n\n{\n  \"from\": \"[email protected]\",\n  \"to\": \\[\"[email protected]\"\\],\n  \"type\": \"critical\",\n  \"subject\": \"New sign-in detected\",\n  \"content\": { \"plain\": \"Review this activity.\" }\n}\n\nem\\_7kR4…queueddurably accepted\n\nPlatform resource model**Live · controlled onboarding**\n\nA\n\nACCOUNT**Acme Platform**\n\nDOMAIN · READY**acme.app**\n\nsecurity@billing@\n\nDOMAIN · VERIFYING**customer-one.com**\n\nnotifications@\n\nAutomate domains, DNS readiness, senders, account details, and usage with separate scoped management keys.\n\nOne infrastructure layer## Two ways to build on Tenvio.\n\nUse the same account-level model whether email belongs to your own product or to the businesses your platform serves.\n\n01\n\n### For your own product\n\nOperate multiple product domains and sender identities for authentication, billing, security, and workflow notifications.\n\nyour appdomainssenders\n\n02\n\n### For your platform\n\nProvision customer-owned domains and senders programmatically with scoped Management API credentials and stable external IDs.\n\nyour platformcustomer domainssenders\n\nThe SMTP problem## A successful API call is only the start.\n\nTransactional mail crosses DNS, queues, retries, transport policy, and recipient infrastructure. Treating that path as a black box leaves product teams guessing when users are waiting.\n\n**Before**Request accepted?\n\n**With Tenvio**queuedsendingaccepted\n\nExplicit state, SMTP outcomes, safe diagnostics, and timestamps—without claiming inbox placement.\n\nDomains are first-class## One account. Multiple sending identities.\n\nAdd domains independently, follow the exact DNS records each one needs, and attach multiple senders to the right domain. A sender’s effective state follows its own configuration and its domain’s readiness.\n\n-   2 domains on the Free plan\n-   3 senders per account\n-   Up to 3 senders per domain\n-   Independent domain and sender state\n\nDOMAINS**2 of 2 used**\n\nAdd domain\n\nA\n\n**acme.app**3 senders · checked 2 min ago\n\nReady\n\nC\n\n**customer.example**1 sender · DNS action required\n\nVerifying\n\nDNS READINESS · CUSTOMER.EXAMPLE**2 of 3 checks passing**\n\nOwnership`_tenvio-verification`**Passed**\n\nDKIM`tenvio1._domainkey`**Pending**\n\nDMARC`_dmarc`**Passed**\n\nACCOUNT**Your SaaS platform**shared quota + scoped keys\n\nDOMAIN**customer-a.com**ready\n\nbilling@alerts@\n\nDOMAIN**customer-b.io**verifying\n\nnotifications@\n\nFor platforms## A resource model built beyond one domain.\n\nThe multi-domain, multi-sender foundation is live. It can represent domains your company owns or domains your customers own without legacy single-domain branches.\n\nManagement API**Live · controlled onboarding**\n\nCreate separate `mg_live_` keys with exact scopes for account and usage reads, plus domain and sender operations. DNS actions use the domain scopes. Sending remains isolated behind `tv_live_` keys.\n\n[Read the Management API guide →](https://docs.tenvio.email/management/)\n\nDirect delivery## Your application to the recipient MX.\n\nTenvio operates the delivery path instead of forwarding sends to another email API provider.\n\n01**Your application**Authenticated API request\n\n02**Tenvio queue**Durable intake + idempotency\n\n03**Delivery engine**Policy + retries\n\n04**Recipient MX**SMTP outcome\n\nA deliberate boundary## Product email with explicit consent.\n\nCritical and transactional messages are available to every plan. Permission-based broadcast requires a paid Custom plan and separate manual approval.\n\n### Available\n\n-   Verification and authentication\n-   Security and account alerts\n-   Receipts and order updates\n-   Approved permission-based broadcast\n\n### Prohibited\n\n-   Cold outreach\n-   Purchased recipient lists\n-   Traffic without documented consent\n\nDelivery lifecycle## Every state means something precise.\n\n**queued**\n\nDurably accepted for delivery.\n\n**sending**\n\nAn attempt is in progress.\n\n**deferred**\n\nA temporary failure will retry.\n\n**accepted**\n\nThe recipient SMTP server accepted it.\n\n**bounced**\n\nThe recipient server rejected it permanently.\n\n**failed**\n\nDelivery ended without acceptance.\n\nAccepted does not guarantee inbox placement. The receiving system controls filtering and final presentation.\n\nDeveloper API## One explicit send contract.\n\nCreate an API key, keep it server-side, and send through the live REST endpoint. Every logical email requires an idempotency key so retries do not create duplicate messages.\n\n**POST**Enqueue an email\n\n**GET**List email history\n\n**GET**Inspect email detail\n\n[Read the complete API reference →](https://docs.tenvio.email/)\n\nSend a transactional emailCopy\n\n```\ncurl -X POST https://api.tenvio.email/v1/emails \\\n  -H \"Authorization: Bearer YOUR_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -H \"Idempotency-Key: 7f4d9b98-63a8-4c43-a958-41d641fe2fd2\" \\\n  -d '{\n    \"from\": \"[email protected]\",\n    \"to\": [\"[email protected]\"],\n    \"cc\": [],\n    \"bcc\": [],\n    \"type\": \"transactional\",\n    \"subject\": \"Your account is ready\",\n    \"content\": { \"plain\": \"You can now sign in.\" }\n  }'\n```\n\nScale with guardrails## Clear limits. Account-level control.\n\nFree includes exact recipient-email quotas and safety limits. Purchased Custom capacity remains subject to abuse, reputation, and infrastructure safety restrictions.\n\n**2**domains\n\n**3**senders\n\n**3**senders / domain\n\n**3,000**recipient-emails / monthly cycle\n\n**250**active delivery jobs\n\nAlso enforced on Free: 30 recipient-emails per rolling minute, 300 per hour, and 300 per rolling 24 hours.\n\nPricing v1## Free and Custom.\n\nExact USD monthly pricing. Taxes may be additional where applicable.\n\nFREE\n\n### $0 / month\n\nCritical and transactional REST API email: 3,000 recipient-emails per monthly cycle, 2 domains, 3 senders total and per domain, one sending key, 250 active deliveries, and 14-day history. Broadcast is disabled.\n\nCUSTOM\n\n### From $10 / month\n\nChoose 10,000 to 2,500,000 recipient-emails and capacity for up to 10–1,000 managed domains. Hard Cap is the only exhaustion mode. Permission-based broadcast requires separate manual approval.\n\n[Build and review exact pricing →](https://docs.tenvio.email/plans/)\n\nControlled onboarding## A focused product email surface.\n\n### Available\n\n-   Critical and transactional REST Email API\n-   Multiple domains and senders\n-   BCC input with address-private history\n-   Approved Custom permission-based broadcast\n-   Free and Custom Hard Cap plans\n\n### Policy boundary\n\n-   Explicit recipient permission\n-   Documented audience source\n-   No cold outreach\n-   No purchased lists\n\nFAQ## The infrastructure, without the ambiguity.\n\n**What is Tenvio?**\n\nTenvio is product email infrastructure for critical, transactional, and separately approved permission-based broadcast traffic.\n\n**Can one account use multiple domains and senders?**\n\nYes. The Free plan supports 2 domains and 3 senders across the account, with up to 3 senders on one domain.\n\n**Does “accepted” mean delivered to the inbox?**\n\nNo. It means the recipient mail server accepted the message. The receiving system controls filtering and inbox placement.\n\n**How is broadcast enabled?**\n\nA paid Custom plan is necessary but not sufficient. Tenvio separately reviews permission and risk controls before an operator approves broadcast capability. Payment never grants approval.\n\n**Can I use a purchased list or send cold outreach?**\n\nNo. Both are prohibited. Broadcast recipients require a documented permission basis and audience source.\n\nRequest access## Tell us what your product needs to send.\n\nTenvio is onboarding SaaS products and platforms during controlled onboarding. Share your domain model, transactional use case, and expected volume.\n\n**Keep secrets out of this form.**Do not include API keys, passwords, recipient lists, or message payloads.\n\nName\n\nWork email\n\nCompany or product\n\nWebsite\n\nUse caseSelect oneEmail for our own productEmail for a SaaS platformBothReport abuseSomething else\n\nMonthly volume OptionalNot sure yetUnder 10,00010,000–100,000100,000–1 millionMore than 1 million\n\nWhat are you building?Describe the transactional messages and how domains belong to your product or customers.\n\nLeave this field empty\n\nSend request →\n",
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      "howToKey": "rec.add_content_signals.howto",
      "howToStepKeys": null,
      "effort": "quick-win",
      "estimatedImpact": 2.5,
      "maxImpact": 2.5,
      "evidence": "speculative",
      "checkScore": 0,
      "checkDetails": "No Content-Signal found (robots.txt or HTTP headers)"
    },
    {
      "id": "add_semantic_elements",
      "priority": "medium",
      "category": "semanticHtml",
      "titleKey": "rec.add_semantic_elements.title",
      "descriptionKey": "rec.add_semantic_elements.description",
      "howToKey": "rec.add_semantic_elements.howto",
      "howToStepKeys": null,
      "effort": "moderate",
      "estimatedImpact": 1.6,
      "maxImpact": 3,
      "evidence": "plausible",
      "checkScore": 46,
      "checkDetails": "22 semantic elements, 138 divs (ratio: 14%)"
    }
  ],
  "llmsTxtPreview": "# Tenvio\n\n> Transactional email infrastructure for SaaS products and platforms, with multiple domains, multiple senders, DNS readiness, queues, retries, and delivery telemetry.\n\n## Main\n- [Tenvio - Transactional Email API for SaaS Platforms](https://tenvio.email): Transactional email infrastructure for SaaS products and platforms, with multiple domains, multiple senders, DNS readin…\n- [Tenvio](https://tenvio.email/)\n- [Request access](https://tenvio.email/?topic=access)\n- [Acceptable Use](https://tenvio.email/acceptable-use.html)\n- [Report abuse](https://tenvio.email/abuse.html)\n\n## Legal\n- [Privacy](https://tenvio.email/privacy.html)\n- [Terms](https://tenvio.email/terms.html)\n\n",
  "llmsTxtExisting": "# Tenvio\n\n> Tenvio is server-side email infrastructure for applications that send critical and transactional product email through a REST API, with multi-domain account management.\n\nThe canonical technical source is docs.tenvio.email. Prefer its OpenAPI contract for exact request and response schemas.\n\n## Product\n\n- [Product overview](https://tenvio.email/index.md)\n- [Acceptable use](https://tenvio.email/acceptable-use.md)\n- [Privacy](https://tenvio.email/privacy.md)\n- [Terms](https://tenvio.email/terms.md)\n- [Abuse](https://tenvio.email/abuse.md)\n\n## Developer resources\n\n- [AI-readable documentation index](https://docs.tenvio.email/llms.txt)\n- [Full technical documentation](https://docs.tenvio.email/llms-full.txt)\n- [Getting started](https://docs.tenvio.email/getting-started/index.md)\n- [Sending API](https://docs.tenvio.email/sending/index.md)\n- [Plans and limits](https://docs.tenvio.email/plans/index.md)\n- [OpenAPI YAML](https://docs.tenvio.email/openapi.yaml)\n- [OpenAPI JSON](https://docs.tenvio.email/openapi.json)\n\n## Complete product context\n\n- [Full product context](https://tenvio.email/llms-full.txt)",
  "emergingProtocols": {
    "oauthProtectedResource": {
      "exists": false,
      "url": "https://tenvio.email/.well-known/oauth-protected-resource"
    },
    "oauthDiscovery": {
      "exists": false,
      "url": "https://tenvio.email/.well-known/oauth-authorization-server"
    },
    "mcpServerCard": {
      "exists": false,
      "url": "https://tenvio.email/.well-known/mcp/server-card.json",
      "draft": true
    },
    "a2aAgentCard": {
      "exists": false,
      "url": "https://tenvio.email/.well-known/agent-card.json"
    },
    "apiCatalog": {
      "exists": false,
      "url": "https://tenvio.email/.well-known/api-catalog"
    },
    "agentSkills": {
      "exists": false,
      "url": "https://tenvio.email/.well-known/agent-skills/index.json",
      "draft": true
    },
    "count": 0,
    "total": 6
  },
  "botAccess": {
    "probed": true,
    "bot": "OAI-SearchBot",
    "controlStatus": 200,
    "botStatus": 200,
    "discriminates": false,
    "refusedAsBot": false,
    "edge": null,
    "verifiable": false,
    "detail": "This origin answers OAI-SearchBot exactly as it answers any other client (200). No edge-level filtering of AI crawlers observed."
  },
  "snippets": [
    {
      "id": "add_content_signals",
      "title": "Add Content-Signal directives",
      "description": "Content-Signal tells AI agents how they may use your content. The canonical location is robots.txt, but you can also expose it as an HTTP header from any stack.",
      "language": "txt",
      "code": "User-agent: *\nContent-Signal: search=yes, ai-input=yes, ai-train=no",
      "filename": "/robots.txt",
      "stacks": [
        {
          "id": "robots",
          "label": "robots.txt",
          "language": "txt",
          "filename": "/robots.txt",
          "code": "User-agent: *\nContent-Signal: search=yes, ai-input=yes, ai-train=no"
        },
        {
          "id": "nginx",
          "label": "Nginx",
          "language": "nginx",
          "filename": "server block",
          "code": "# Inside your server { } block:\nadd_header Content-Signal \"search=yes, ai-input=yes, ai-train=no\" always;"
        },
        {
          "id": "apache",
          "label": "Apache",
          "language": "apache",
          "filename": ".htaccess",
          "code": "# In .htaccess (or VirtualHost):\nHeader set Content-Signal \"search=yes, ai-input=yes, ai-train=no\""
        },
        {
          "id": "wordpress",
          "label": "WordPress",
          "language": "php",
          "filename": "functions.php",
          "code": "<?php\n// In your theme's functions.php or a small mu-plugin\nadd_action('send_headers', function () {\n    header('Content-Signal: search=yes, ai-input=yes, ai-train=no');\n});\n\n// Optional: also append the directive to the dynamic robots.txt\nadd_filter('robots_txt', function ($output) {\n    return $output . \"\\nContent-Signal: search=yes, ai-input=yes, ai-train=no\\n\";\n}, 10, 1);"
        },
        {
          "id": "nextjs",
          "label": "Next.js",
          "language": "typescript",
          "filename": "middleware.ts",
          "code": "// middleware.ts (Next.js 13+ App Router or Pages Router)\nimport { NextResponse } from 'next/server';\nexport function middleware() {\n  const res = NextResponse.next();\n  res.headers.set(\n    'Content-Signal',\n    'search=yes, ai-input=yes, ai-train=no'\n  );\n  return res;\n}\nexport const config = { matcher: '/:path*' };"
        },
        {
          "id": "cloudflare",
          "label": "Cloudflare Workers",
          "language": "javascript",
          "filename": "worker.js",
          "code": "// Cloudflare Worker that proxies your origin and adds the header\nexport default {\n  async fetch(request, env, ctx) {\n    const res = await fetch(request);\n    const newRes = new Response(res.body, res);\n    newRes.headers.set(\n      'Content-Signal',\n      'search=yes, ai-input=yes, ai-train=no'\n    );\n    return newRes;\n  },\n};"
        },
        {
          "id": "express",
          "label": "Express / Fastify",
          "language": "javascript",
          "filename": "server.js",
          "code": "// Express\napp.use((req, res, next) => {\n  res.setHeader('Content-Signal', 'search=yes, ai-input=yes, ai-train=no');\n  next();\n});\n\n// Fastify\nfastify.addHook('onSend', (request, reply, payload, done) => {\n  reply.header('Content-Signal', 'search=yes, ai-input=yes, ai-train=no');\n  done();\n});"
        }
      ]
    }
  ]
}

Use our API to get this programmatically (coming soon)