{"templateId":"markdown","sharedDataIds":{"sidebar":"sidebar-docs/email-api/sidebars.yaml"},"props":{"metadata":{"markdoc":{"tagList":["tabs","tab"]},"type":"markdown"},"seo":{"title":"Use a sender on all API Keys (metasender)","siteUrl":"https://dev.mailjet.com/","projectTitle":"Mailjet Developer Documentation","description":"Share one Mailjet sender address or domain across all sub-account API keys by creating a metasender with POST /metasender instead of registering it separately.","image":"https://dev.mailjet.com/og-image.png","lang":"en-US","keywords":["Mailjet API","Email API","Content API","SMTP Relay","transactional email","email delivery","Send API","email templates","developer documentation"],"meta":[{"name":"og:type","content":"website"},{"name":"og:site_name","content":"Mailjet Developer Documentation"},{"name":"twitter:card","content":"summary_large_image"},{"name":"robots","content":"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"},{"name":"googlebot","content":"index, follow, max-snippet:-1, max-image-preview:large"}],"jsonLd":{"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://dev.mailjet.com/#organization","name":"Mailjet","alternateName":"Sinch Mailjet","url":"https://www.mailjet.com","logo":"https://assets.mailjet.com/lib/images/mailjetLogo/mj_logo_with_text_color.png","parentOrganization":{"@type":"Organization","name":"Sinch","url":"https://www.sinch.com"}},{"@type":"WebSite","@id":"https://dev.mailjet.com/#website","name":"Mailjet Developer Documentation","description":"Official developer documentation for the Mailjet Email API, Content API and SMTP Relay.","url":"https://dev.mailjet.com/","inLanguage":"en-US","publisher":{"@id":"https://dev.mailjet.com/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://dev.mailjet.com/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]},"llmstxt":{"hide":false,"title":"Mailjet Developer Documentation","description":"Developer documentation for the Mailjet Email API, Content API and SMTP Relay - guides, API references and code samples for sending, templating and tracking email at scale.","details":{"content":"Mailjet (part of Sinch) provides APIs for sending and managing email.\n\nThis documentation covers four main areas:\n\n- **Email API** - the Send API (v3 and v3.1) for transactional and marketing email,\n  plus contact management, segmentation, campaigns, statistics, webhooks, the Parse API\n  and the Mailjet Templating Language.\n- **Content API** - programmatic management of email templates, template contents,\n  images, labels and authentication tokens (v1).\n- **SMTP Relay** - sending through Mailjet's SMTP servers, including custom headers.\n- **API Reference** - the complete, generated reference for every endpoint, built directly\n  from the OpenAPI specifications.\n\nBase URL for all REST APIs: `https://api.mailjet.com`.\nAuthentication uses HTTP Basic auth with an API key and secret key.\n\n## Machine-readable entry points\n\nPrefer these when you need the API surface in as few requests as possible:\n\n- `/openapi/openapi-mailjet.md` - the **complete** Email API reference (every endpoint,\n  grouped by resource) as a single Markdown document.\n- `/openapi/openapi-passport.md` - the **complete** Content API reference as a single\n  Markdown document.\n- `/_bundle/openapi/openapi-mailjet.yaml` - the raw, fully bundled OpenAPI 3 description\n  of the Email API.\n- `/_bundle/openapi/openapi-passport.yaml` - the raw, fully bundled OpenAPI 3 description\n  of the Content API.\n- `/sitemap.xml` - every indexable URL on this site.\n\nEvery page on this site is also available as clean Markdown by appending `.md` to its URL."},"sections":[{"title":"Email API","description":"Sending, contacts, campaigns, statistics, webhooks and templating.","includeFiles":["docs/email-api/**/*.md"],"excludeFiles":[]},{"title":"Content API","description":"Manage templates, template contents, images, labels and tokens.","includeFiles":["docs/content-api/**/*.md","docs/content-api.md"],"excludeFiles":[]},{"title":"SMTP Relay","description":"Send email through Mailjet's SMTP servers.","includeFiles":["docs/smtp-relay/**/*.md"],"excludeFiles":[]},{"title":"API Reference","description":"Complete generated reference for every Mailjet API endpoint.","includeFiles":["openapi/openapi-mailjet.yaml","openapi/openapi-passport.yaml","docs/api-reference/**/*.md"],"excludeFiles":[]},{"title":"Migrating from Mandrill","description":"Guides for switching from Mandrill to Mailjet.","includeFiles":["docs/mandrill/**/*.md"],"excludeFiles":[]}],"excludeFiles":[]}},"dynamicMarkdocComponents":[],"compilationErrors":[],"ast":{"$$mdtype":"Tag","name":"article","attributes":{},"children":[{"$$mdtype":"Tag","name":"Heading","attributes":{"level":1,"id":"use-a-sender-on-all-api-keys-metasender","__idx":0},"children":["Use a sender on all API Keys (metasender)"]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["By default your senders are not shared between the primary and sub-account API keys. In case you want to use the same sender / domain on all your API keys, you should create a metasender."]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["Do a POST /metasender to create a new metasender object."]},{"$$mdtype":"Tag","name":"Heading","attributes":{"level":3,"id":"example","__idx":1},"children":["Example"]},{"$$mdtype":"Tag","name":"Tabs","attributes":{"size":"medium"},"children":[{"$$mdtype":"Tag","name":"TabItemFragment","attributes":{"label":"cURL","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"data-language":"shell","header":{"controls":{"copy":{}}},"source":"curl -s \\\n\t-X POST \\\n\t--user \"$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE\" \\\n\thttps://api.mailjet.com/v3/REST/metasender \\\n\t-H 'Content-Type: application/json' \\\n\t-d '{\n      \"Description\":\"Metasender 1 - used for Promo emails\",\n      \"Email\":\"pilot@mailjet.com\"\n\t}'\n","lang":"shell"},"children":[]}]},{"$$mdtype":"Tag","name":"TabItemFragment","attributes":{"label":"PHP","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"data-language":"php","header":{"controls":{"copy":{}}},"source":"<?php\nrequire 'vendor/autoload.php';\nuse \\Mailjet\\Resources;\n$mj = new \\Mailjet\\Client(getenv('MJ_APIKEY_PUBLIC'), getenv('MJ_APIKEY_PRIVATE'),true,['version' => 'v3']);\n$body = [\n  'Description' => \"Metasender 1 - used for Promo emails\",\n  'Email' => \"pilot@mailjet.com\"\n];\n$response = $mj->post(Resources::$Metasender, ['body' => $body]);\n$response->success() && var_dump($response->getData());\n?>\n","lang":"php"},"children":[]}]},{"$$mdtype":"Tag","name":"TabItemFragment","attributes":{"label":"Node.js","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"data-language":"javascript","header":{"controls":{"copy":{}}},"source":"const mailjet = require ('node-mailjet')\n\t.connect(process.env.MJ_APIKEY_PUBLIC, process.env.MJ_APIKEY_PRIVATE)\nconst request = mailjet\n\t.post(\"metasender\", {'version': 'v3'})\n\t.request({\n      \"Description\":\"Metasender 1 - used for Promo emails\",\n      \"Email\":\"pilot@mailjet.com\"\n    })\nrequest\n\t.then((result) => {\n\t\tconsole.log(result.body)\n\t})\n\t.catch((err) => {\n\t\tconsole.log(err.statusCode)\n\t})\n","lang":"javascript"},"children":[]}]},{"$$mdtype":"Tag","name":"TabItemFragment","attributes":{"label":"Ruby","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"data-language":"ruby","header":{"controls":{"copy":{}}},"source":"require 'mailjet'\nMailjet.configure do |config|\n  config.api_key = ENV['MJ_APIKEY_PUBLIC']\n  config.secret_key = ENV['MJ_APIKEY_PRIVATE']\n  config.api_version = \"v3\"\nend\nvariable = Mailjet::Metasender.create(\n  description: \"Metasender 1 - used for Promo emails\",\n  email: \"pilot@mailjet.com\"\n)\np variable.attributes['Data']\n","lang":"ruby"},"children":[]}]},{"$$mdtype":"Tag","name":"TabItemFragment","attributes":{"label":"Python","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"data-language":"python","header":{"controls":{"copy":{}}},"source":"from mailjet_rest import Client\nimport os\napi_key = os.environ['MJ_APIKEY_PUBLIC']\napi_secret = os.environ['MJ_APIKEY_PRIVATE']\nmailjet = Client(auth=(api_key, api_secret), version='v3')\ndata = {\n  'Description': \"Metasender 1 - used for Promo emails\",\n  'Email': \"pilot@mailjet.com\"\n}\nresult = mailjet.metasender.create(data=data)\nprint result.status_code\nprint result.json()\n","lang":"python"},"children":[]}]},{"$$mdtype":"Tag","name":"TabItemFragment","attributes":{"label":"Java","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"data-language":"java","header":{"controls":{"copy":{}}},"source":"package com.my.project;\nimport com.mailjet.client.errors.MailjetException;\nimport com.mailjet.client.errors.MailjetSocketTimeoutException;\nimport com.mailjet.client.MailjetClient;\nimport com.mailjet.client.MailjetRequest;\nimport com.mailjet.client.MailjetResponse;\nimport com.mailjet.client.ClientOptions;\nimport com.mailjet.client.resource.Metasender;\nimport org.json.JSONArray;\nimport org.json.JSONObject;\npublic class MyClass {\n    public static void main(String[] args) throws MailjetException, MailjetSocketTimeoutException {\n      MailjetClient client;\n      MailjetRequest request;\n      MailjetResponse response;\n      client = new MailjetClient(System.getenv(\"MJ_APIKEY_PUBLIC\"), System.getenv(\"MJ_APIKEY_PRIVATE\"), new ClientOptions(\"v3\"));\n      request = new MailjetRequest(Metasender.resource)\n            .property(Metasender.DESCRIPTION, \"Metasender 1 - used for Promo emails\")\n            .property(Metasender.EMAIL, \"pilot@mailjet.com\")\n      );\n      response = client.post(request);\n      System.out.println(response.getStatus());\n      System.out.println(response.getData());\n    }\n}\n","lang":"java"},"children":[]}]},{"$$mdtype":"Tag","name":"TabItemFragment","attributes":{"label":"Go","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"data-language":"go","header":{"controls":{"copy":{}}},"source":"package main\nimport (\n\t\"fmt\"\n\t\"log\"\n\t\"os\"\n\tmailjet \"github.com/mailjet/mailjet-apiv3-go\"\n\t\"github.com/mailjet/mailjet-apiv3-go/resources\"\n)\nfunc main () {\n\tmailjetClient := NewMailjetClient(os.Getenv(\"MJ_APIKEY_PUBLIC\"), os.Getenv(\"MJ_APIKEY_PRIVATE\"))\n\tvar data []resources.Metasender\n\tmr := &Request{\n\t  Resource: \"metasender\",\n\t}\n\tfmr := &FullRequest{\n\t  Info: mr,\n\t  Payload: &resources.Metasender { \n\t  Description:\"Metasender 1 - used for Promo emails\",\n\t  Email:\"pilot@mailjet.com\"\n      }\n\t}\n\terr := mailjetClient.Post(fmr, &data)\n\tif err != nil {\n\t  fmt.Println(err)\n\t}\n\tfmt.Printf(\"Data array: %+v\\n\", data)\n}\n","lang":"go"},"children":[]}]},{"$$mdtype":"Tag","name":"TabItemFragment","attributes":{"label":"C#","disable":false},"children":[{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"data-language":"csharp","header":{"controls":{"copy":{}}},"source":"using Mailjet.Client;\nusing Mailjet.Client.Resources;\nusing System;\nusing Newtonsoft.Json.Linq;\nnamespace Mailjet.ConsoleApplication\n{\n   class Program\n   {\n      static void Main(string[] args)\n      {\n         RunAsync().Wait();\n      }\n      static async Task RunAsync()\n      {\n         MailjetClient client = new MailjetClient(Environment.GetEnvironmentVariable(\"MJ_APIKEY_PUBLIC\"), Environment.GetEnvironmentVariable(\"MJ_APIKEY_PRIVATE\"))\n         {\n            Version = ApiVersion.V3,\n         };\n         MailjetRequest request = new MailjetRequest\n         {\n            Resource = Metasender.Resource,\n         }\n             .Property(Metasender.Description, \"Metasender 1 - used for Promo emails\")\n             .Property(Metasender.Email, \"pilot@mailjet.com\");\n         MailjetResponse response = await client.PostAsync(request);\n         if (response.IsSuccessStatusCode)\n         {\n            Console.WriteLine(string.Format(\"Total: {0}, Count: {1}\\n\", response.GetTotal(), response.GetCount()));\n            Console.WriteLine(response.GetData());\n         }\n         else\n         {\n            Console.WriteLine(string.Format(\"StatusCode: {0}\\n\", response.StatusCode));\n            Console.WriteLine(string.Format(\"ErrorInfo: {0}\\n\", response.GetErrorInfo()));\n            Console.WriteLine(response.GetData());\n            Console.WriteLine(string.Format(\"ErrorMessage: {0}\\n\", response.GetErrorMessage()));\n         }\n      }\n   }\n}\n","lang":"csharp"},"children":[]}]}]},{"$$mdtype":"Tag","name":"Heading","attributes":{"level":3,"id":"api-response","__idx":2},"children":["API Response"]},{"$$mdtype":"Tag","name":"CodeBlock","attributes":{"header":{"controls":{"copy":{}}},"source":"{\n\t\"Count\": 1,\n\t\"Data\": [\n\t\t{\n\t\t\t\"Description\": \"Metasender 1 - used for Promo emails\",\n\t\t\t\"CreatedAt\": \"2018-01-01T00:00:00\",\n\t\t\t\"Email\": \"pilot@mailjet.com\",\n\t\t\t\"Filename\": \"a12345b67c123456ab1ca12345b1234b5.txt\",\n\t\t\t\"ID\": 123,\n\t\t\t\"IsEnabled\": true\n\t\t}\n\t],\n\t\"Total\": 1\n}\n"},"children":[]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["Afterwards you need to ",{"$$mdtype":"Tag","name":"b","attributes":{},"children":["request the validation of the metasender by our support team"]},". Once done, it will be authorized for use on all of your API keys and any additional senders matching this metasender will also be validated."]}]},"headings":[{"value":"Use a sender on all API Keys (metasender)","id":"use-a-sender-on-all-api-keys-metasender","depth":1},{"value":"Example","id":"example","depth":3},{"value":"API Response","id":"api-response","depth":3}],"frontmatter":{"title":"Mailjet Senders and Domains","seo":{"description":"Share one Mailjet sender address or domain across all sub-account API keys by creating a metasender with POST /metasender instead of registering it separately.","title":"Use a sender on all API Keys (metasender)"}},"lastModified":"2026-08-26T10:53:57.000Z","pagePropGetterError":{"message":"","name":""}},"slug":"/docs/email-api/senders-domains/metasender","userData":{"isAuthenticated":false,"teams":["anonymous"]},"isPublic":true}