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# Resend

> Resend is the email API for developers. The documentation covers the REST API, official SDKs, the CLI, the MCP server, webhooks, deliverability guides, and step-by-step quickstarts for every major language and framework.

- [Introduction](https://resend.com/docs/introduction.md): Resend is the email API for developers.
- [Create an API key](https://resend.com/docs/create-an-api-key.md): Get started sending emails by creating an API key
- [Add and verify a domain](https://resend.com/docs/add-a-domain.md): Get started sending emails by adding a domain to your account.
- [Sending emails with Resend](https://resend.com/docs/email-types.md): Resend has a wide range of features for sending both transactional and marketing emails.
- [AI onboarding](https://resend.com/docs/ai-onboarding.md): Everything you need to onboard your AI agent to Resend.
- [Send emails with Node.js](https://resend.com/docs/send-with-nodejs.md): Learn how to send your first email using the Resend Node.js SDK.
- [Send emails with Next.js](https://resend.com/docs/send-with-nextjs.md): Learn how to send your first email using Next.js and the Resend Node.js SDK.
- [Send emails with Remix](https://resend.com/docs/send-with-remix.md): Learn how to send your first email using Remix and the Resend Node.js SDK.
- [Send emails with Nuxt](https://resend.com/docs/send-with-nuxt.md): Learn how to send your first email using Nuxt and the Resend Node.js SDK.
- [Send emails with TanStack Start](https://resend.com/docs/send-with-tanstack-start.md): Learn how to send your first email using TanStack Start and the Resend Node.js SDK.
- [Send emails with SvelteKit](https://resend.com/docs/send-with-sveltekit.md): Learn how to send your first email using SvelteKit and the Resend Node.js SDK.
- [Send emails with Express](https://resend.com/docs/send-with-express.md): Learn how to send your first email using Express and the Resend Node.js SDK.
- [Send emails with RedwoodJS](https://resend.com/docs/send-with-redwoodjs.md): Learn how to send your first email using Redwood.js and the Resend Node.js SDK.
- [Send emails with Hono](https://resend.com/docs/send-with-hono.md): Learn how to send your first email using Hono and the Resend Node.js SDK.
- [Send emails with Bun](https://resend.com/docs/send-with-bun.md): Learn how to send your first email using Bun and the Resend Node.js SDK.
- [Send emails with Astro](https://resend.com/docs/send-with-astro.md): Learn how to send your first email using Astro, Resend, and Node.js.
- [Send emails with Railway](https://resend.com/docs/send-with-railway.md): Learn how to send your first email using Railway and the Resend Node.js SDK.
- [Send emails with Encore](https://resend.com/docs/send-with-encore-ts.md): Learn how to send your first email using Encore and the Resend Node.js SDK.
- [Send Better Auth emails with Resend](https://resend.com/docs/send-with-better-auth.md): Learn how to send Better Auth transactional emails through Resend using email hooks.
- [Send emails with Vercel Functions](https://resend.com/docs/send-with-vercel-functions.md): Learn how to send your first email using Vercel Functions.
- [Send emails with Supabase Edge Functions](https://resend.com/docs/send-with-supabase-edge-functions.md): Learn how to send your first email using Supabase Edge Functions.
- [Send emails with Cloudflare Workers](https://resend.com/docs/send-with-cloudflare-workers.md): Learn how to send your first email using Cloudflare Workers.
- [Send emails with Deno Deploy](https://resend.com/docs/send-with-deno-deploy.md): Learn how to send your first email using Deno Deploy.
- [Send emails with AWS Lambda](https://resend.com/docs/send-with-aws-lambda.md): Learn how to send your first email using AWS Lambda.
- [Send emails with PHP](https://resend.com/docs/send-with-php.md): Learn how to send your first email using the Resend PHP SDK.
- [Send emails with Laravel](https://resend.com/docs/send-with-laravel.md): Learn how to send your first email using Laravel.
- [Send emails with Symfony](https://resend.com/docs/send-with-symfony.md): Learn how to send your first email using the Symfony Resend Mailer Bridge.
- [Send emails with Ruby](https://resend.com/docs/send-with-ruby.md): Learn how to send your first email using the Resend Ruby SDK.
- [Send emails with Rails](https://resend.com/docs/send-with-rails.md): Learn how to send your first email using Rails and the Resend Ruby SDK.
- [Send emails with Sinatra](https://resend.com/docs/send-with-sinatra.md): Learn how to send your first email using Sinatra and the Resend Ruby SDK.
- [Send emails with Python](https://resend.com/docs/send-with-python.md): Learn how to send your first email using the Resend Python SDK.
- [Send emails with Flask](https://resend.com/docs/send-with-flask.md): Learn how to send your first email using Flask and the Resend Python SDK.
- [Send emails with FastAPI](https://resend.com/docs/send-with-fastapi.md): Learn how to send your first email using FastAPI and the Resend Python SDK.
- [Send emails with Django](https://resend.com/docs/send-with-django.md): Learn how to send your first email using Django and the Resend Python SDK.
- [Send emails with Go](https://resend.com/docs/send-with-go.md): Learn how to send your first email using the Resend Go SDK.
- [Send emails with Encore](https://resend.com/docs/send-with-encore-go.md): Learn how to send your first email using Encore and the Resend Go SDK.
- [Send emails with Rust](https://resend.com/docs/send-with-rust.md): Learn how to send your first email using the Resend Rust SDK.
- [Send emails with Axum](https://resend.com/docs/send-with-axum.md): Send your first email using Axum and the Resend Rust SDK.
- [Send emails with Elixir](https://resend.com/docs/send-with-elixir.md): Learn how to send your first email using the Resend Elixir SDK.
- [Send emails with Phoenix](https://resend.com/docs/send-with-phoenix.md): Learn how to send your first email using Phoenix and the Resend Elixir SDK.
- [Send emails with Java](https://resend.com/docs/send-with-java.md): Learn how to send your first email using the Resend Java SDK.
- [Send emails with .NET](https://resend.com/docs/send-with-dotnet.md): Learn how to send your first email using the Resend .NET SDK.
- [Send emails with SMTP](https://resend.com/docs/send-with-smtp.md): Learn how to integrate Resend via SMTP.
- [Send Auth0 transactional emails with Resend](https://resend.com/docs/send-with-auth0.md): Learn how to send Auth0 transactional emails through Resend using the official integration.
- [Send emails using Customer.io with SMTP](https://resend.com/docs/send-with-customer-io-smtp.md): Learn how to integrate Customer.io with Resend SMTP.
- [Send emails using Django with SMTP](https://resend.com/docs/send-with-django-smtp.md): Learn how to integrate Django with Resend SMTP.
- [Send emails using Laravel with SMTP](https://resend.com/docs/send-with-laravel-smtp.md): Learn how to send your first email using Laravel with SMTP.
- [Send emails using Liferay with SMTP](https://resend.com/docs/send-with-liferay-smtp.md): Learn how to integrate Liferay with Resend SMTP.
- [Send emails using Nodemailer with SMTP](https://resend.com/docs/send-with-nodemailer-smtp.md): Learn how to send your first email using Nodemailer with SMTP.
- [Send emails using PHPMailer with SMTP](https://resend.com/docs/send-with-phpmailer-smtp.md): Learn how to send your first email using PHPMailer with SMTP.
- [Send emails using Rails with SMTP](https://resend.com/docs/send-with-rails-smtp.md): Learn how to integrate Rails with Resend SMTP.
- [Send emails using Retool with SMTP](https://resend.com/docs/send-with-retool-smtp.md): Learn how to integrate Retool with Resend SMTP.
- [Send emails using Supabase with SMTP](https://resend.com/docs/send-with-supabase-smtp.md): Learn how to integrate Supabase Auth with Resend SMTP.
- [Send emails using WordPress with SMTP](https://resend.com/docs/send-with-wordpress-smtp.md): Learn how to send your first email using Wordpress.
- [Send emails using NextAuth with SMTP](https://resend.com/docs/send-with-nextauth-smtp.md): Learn how to send your first email using NextAuth.
- [Send emails using Metabase with SMTP](https://resend.com/docs/send-with-metabase-smtp.md): Learn how to integrate Metabase with Resend SMTP.
- [Send emails with Resend CLI](https://resend.com/docs/cli-quickstart.md): Learn how to send your first email using the Resend CLI.
- [Verified Domains](https://resend.com/docs/dashboard/domains/introduction.md): An introduction to verified domains in Resend.
- [Managing Domains](https://resend.com/docs/dashboard/domains/manage-domains.md): Learn how to view, update, and delete your verified domains in Resend.
- [Implementing DMARC](https://resend.com/docs/dashboard/domains/dmarc.md): Implement DMARC to build trust in your domain and protect against email spoofing and unauthorized use of your domain in email messages.
- [Implementing BIMI](https://resend.com/docs/dashboard/domains/bimi.md): Set up BIMI to gain brand recognition by displaying your logo in the inbox.
- [Open and Click Tracking](https://resend.com/docs/dashboard/domains/tracking.md): Track open and click rates of your emails.
- [Configure Transport Layer Security (TLS)](https://resend.com/docs/dashboard/domains/tls.md): Learn how to configure TLS for your verified domain in Resend.
- [Configure a custom Return Path](https://resend.com/docs/dashboard/domains/custom-return-path.md): Learn how to configure a custom Return Path for your verified domain in Resend.
- [Choosing a Region](https://resend.com/docs/dashboard/domains/regions.md): Resend offers sending from multiple regions
- [Claiming a domain](https://resend.com/docs/dashboard/domains/claim.md): Claim a domain that is already verified by another team.
- [Sending Emails](https://resend.com/docs/dashboard/emails/introduction.md): An introduction to sending emails with Resend.
- [View and manage emails](https://resend.com/docs/dashboard/emails/manage-emails.md): An introduction to managing your sent emails with Resend.
- [Batch Sending](https://resend.com/docs/dashboard/emails/batch-sending.md): Send up to 100 emails in a single API call.
- [Attachments](https://resend.com/docs/dashboard/emails/attachments.md): Send emails with attachments.
- [Embed Inline Images](https://resend.com/docs/dashboard/emails/embed-inline-images.md): Send emails with inline images.
- [Schedule Email](https://resend.com/docs/dashboard/emails/schedule-email.md): Send emails at a specific time without additional complexity.
- [Send Test Emails](https://resend.com/docs/dashboard/emails/send-test-emails.md): Simulate different events by sending test emails.
- [Custom Headers](https://resend.com/docs/dashboard/emails/custom-headers.md): Customize how emails are sent with your own headers.
- [Idempotency Keys](https://resend.com/docs/dashboard/emails/idempotency-keys.md): Use idempotency keys to ensure that emails are sent only once.
- [Email Bounces](https://resend.com/docs/dashboard/emails/email-bounces.md): Understanding and resolving delivery issues.
- [Email Suppressions](https://resend.com/docs/dashboard/emails/email-suppressions.md): Managing your team Suppressions to protect your sending reputation.
- [Deliverability Insights](https://resend.com/docs/dashboard/emails/deliverability-insights.md): Improve your deliverability with tailored insights based on your sending.
- [Add an unsubscribe link to transactional emails](https://resend.com/docs/dashboard/emails/add-unsubscribe-to-transactional-emails.md): Learn how to give email recipients the ability to unsubscribe without searching for the unsubscribe link.
- [Managing Tags](https://resend.com/docs/dashboard/emails/tags.md): Add unique identifiers to emails sent.
- [Receiving Emails](https://resend.com/docs/dashboard/receiving/introduction.md): An introduction to receiving emails with Resend.
- [Managing Emails](https://resend.com/docs/dashboard/receiving/manage-emails.md): An introduction to managing your received emails with Resend.
- [Custom Receiving Domains](https://resend.com/docs/dashboard/receiving/custom-domains.md): Receive emails using your own domain.
- [Create a receiving Webhook](https://resend.com/docs/dashboard/receiving/create-receiving-webhook.md): Learn how to create a webhook to respond to received emails with Resend.
- [Process Receiving Attachments](https://resend.com/docs/dashboard/receiving/attachments.md): Process attachments from receiving emails.
- [Get Email Content](https://resend.com/docs/dashboard/receiving/get-email-content.md): Get the body and headers of a received email.
- [Forward Received Emails](https://resend.com/docs/dashboard/receiving/forward-emails.md): Forward Received emails to another email address.
- [Reply to Receiving Emails](https://resend.com/docs/dashboard/receiving/reply-to-emails.md): Reply to Receiving emails in the same thread.
- [Sending Broadcasts](https://resend.com/docs/dashboard/broadcasts/introduction.md): An introduction to sending bulk marketing emails with Resend.
- [Manage Broadcasts](https://resend.com/docs/dashboard/broadcasts/manage-broadcasts.md): Learn how to view, update, and delete your Broadcasts.
- [Compose and send with the Broadcast editor](https://resend.com/docs/dashboard/broadcasts/editor.md): Learn how to write and send your Broadcasts in the Dashboard editor
- [Compose and send Broadcasts with the API](https://resend.com/docs/dashboard/broadcasts/send-broadcast-with-api.md): Send marketing emails using the Broadcasts API.
- [Performance Tracking](https://resend.com/docs/dashboard/broadcasts/performance-tracking.md): Track your Broadcasts email performance in real-time
- [Contacts](https://resend.com/docs/dashboard/contacts/introduction.md): An introduction to how your Contacts are organized and maintained in Resend.
- [Add Contacts](https://resend.com/docs/dashboard/contacts/add-contacts.md): Learn how to add Contacts with Resend.
- [Managing Contacts](https://resend.com/docs/dashboard/contacts/manage-contacts.md): Learn how to view, update, and delete your Contacts with Resend.
- [Contact properties](https://resend.com/docs/dashboard/contacts/properties.md): Learn how to work with Contact properties with Resend.
- [Managing Segments](https://resend.com/docs/dashboard/contacts/manage-segments.md): Learn how to create, retrieve, and delete Segments.
- [Topics](https://resend.com/docs/dashboard/contacts/manage-topics.md): Learn how to create, view, delete, and manage Topics.
- [Managing unsubscribed Contacts](https://resend.com/docs/dashboard/contacts/managing-unsubscribe-list.md): Learn how to check and remove recipients who have unsubscribed from your marketing emails.
- [Migrating from Audiences to Segments](https://resend.com/docs/dashboard/contacts/migrating-from-audiences-to-segments.md): Learn how to migrate from Audiences to Segments
- [Automations](https://resend.com/docs/dashboard/automations/introduction.md): An introduction to automating emails with custom events.
- [Create Automations](https://resend.com/docs/dashboard/automations/create-automation.md): Create an automation triggered by an event in your application.
- [Custom Events](https://resend.com/docs/dashboard/automations/custom-events.md): Define custom events to trigger Automations.
- [Connections](https://resend.com/docs/dashboard/automations/connections.md): Connections between steps in Automation workflows.
- [Runs](https://resend.com/docs/dashboard/automations/runs.md): Monitor and debug your Automation executions.
- [Steps](https://resend.com/docs/dashboard/automations/steps.md): Steps and their properties in Automation workflows.
- [Trigger](https://resend.com/docs/dashboard/automations/trigger.md): Start your Automations based on custom events.
- [Condition](https://resend.com/docs/dashboard/automations/condition.md): Route contacts through different paths based on conditions.
- [Delay](https://resend.com/docs/dashboard/automations/delay.md): Pause your Automations with time delays.
- [Wait for Event](https://resend.com/docs/dashboard/automations/wait-for-event.md): Hold your Automations until a specific event is received.
- [Send Email](https://resend.com/docs/dashboard/automations/send-email.md): Trigger templated emails in your Automations.
- [Add to Segment](https://resend.com/docs/dashboard/automations/add-to-segment.md): Include contacts to a segment as part of your Automation.
- [Contact Update](https://resend.com/docs/dashboard/automations/contact-update.md): Update contact fields during an Automation.
- [Contact Delete](https://resend.com/docs/dashboard/automations/contact-delete.md): Remove a contact from your audience in an Automation.
- [Using Templates](https://resend.com/docs/dashboard/templates/introduction.md): Learn how to use Templates to send transactional emails.
- [Create a Template](https://resend.com/docs/dashboard/templates/create-template.md): Learn how to create a Template in the Resend Dashboard editor or with the API.
- [Compose with the Template editor](https://resend.com/docs/dashboard/templates/template-editor.md): Learn how to write reusable transactional email Templates in the Dashboard editor
- [Working with Variables](https://resend.com/docs/dashboard/templates/template-variables.md): How to work with custom variables in Templates.
- [Version History](https://resend.com/docs/dashboard/templates/version-history.md): Edit Templates safely in production environments with version history.
- [Introduction](https://resend.com/docs/dashboard/logs/introduction.md): Learn how to view and troubleshoot API logs.
- [Webhooks](https://resend.com/docs/webhooks/introduction.md): An introduction to using webhooks to notify your application about email events.
- [Create a Webhook](https://resend.com/docs/webhooks/create-webhook.md): Learn how to add a webhook to notify your application about events from Resend.
- [Verify Webhooks Requests](https://resend.com/docs/webhook