Resend

resend.com

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Build, test, and send transactional emails at scale.

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Resend

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Add a domain: Get started sending emails by adding a domain to your account.
Agent Email Inbox Skill: Give your AI agent a secure email inbox to receive and act on inbound emails.
AI Onboarding: Everything you need to onboard your AI agent to Resend.
How to add the Resend integration to your Anything project: Learn how to add the Resend integration to your Anything project.
Create API key: Add a new API key to authenticate communications with Resend.
Delete API key: Remove an existing API key.
List API keys: Retrieve a list of API keys for the authenticated user.
Create Broadcast: Create a new broadcast to send to your contacts.
Delete Broadcast: Remove an existing broadcast.
Retrieve Broadcast: Retrieve a single broadcast.
List Broadcasts: Retrieve a list of broadcast.
Send Broadcast: Start sending broadcasts to your audience through the Resend API.
Update Broadcast: Update a broadcast to send to your contacts.
Create Contact Property: Create a custom property for your contacts.
Delete Contact Property: Remove an existing contact property.
Retrieve Contact Property: Retrieve a contact property by its ID.
List Contact Properties: Retrieve a list of contact properties.
Update Contact Property: Update an existing contact property.
Add Contact to Segment: Add an existing contact to a segment.
Create Contact: Create a contact.
Delete Contact: Remove an existing contact.
Delete Contact Segment: Remove an existing contact from a segment.
Retrieve Contact: Retrieve a single contact.
Retrieve Contact Topics: Retrieve a list of topics subscriptions for a contact.
List Contact Segments: Retrieve a list of segments that a contact is part of.
List Contacts: Show all contacts.
Update Contact: Update an existing contact.
Update Contact Topics: Update topic subscriptions for a contact.
Create Domain: Create a domain through the Resend Email API.
Delete Domain: Remove an existing domain.
Retrieve Domain: Retrieve a single domain for the authenticated user.
List Domains: Retrieve a list of domains for the authenticated user.
Update Domain: Update an existing domain.
Verify Domain: Verify an existing domain.
Cancel Email: Cancel a scheduled email.
List Attachments: Retrieve a list of attachments from a sent email.
List Sent Emails: Retrieve a list of emails sent by your team.
List Attachments: Retrieve a list of attachments from a received email.
List Received Emails: Retrieve a list of received emails for the authenticated user.
Retrieve Sent Email: Retrieve a single sent email.
Retrieve Attachment: Retrieve a single attachment from a sent email.
Retrieve Received Email: Retrieve a single received email.
Retrieve Attachment: Retrieve a single attachment from a received email.
Send Batch Emails: Trigger up to 100 batch emails at once.
Send Email: Start sending emails through the Resend Email API.
Update Email: Update a scheduled email.
Errors: Troubleshoot problems with this comprehensive breakdown of all error codes.
Introduction: Understand general concepts, response codes, and authentication strategies.
List Logs: Retrieve a list of API request logs.
Retrieve Log: Retrieve a single API request log.
Pagination: Learn how pagination works in the Resend API.
Usage Limits: Learn about API rate limits, email sending quotas, and contact quotas.
Create Segment: Create a new segment for contacts to be added to.
Delete Segment: Remove an existing segment.
Retrieve Segment: Retrieve a single segment.
List Segment Contacts: Retrieve a list of contacts in a segment.
List Segments: Retrieve a list of segments.
Create Template: Create a new template with optional variables.
Delete Template: Delete a template.
Duplicate Template: Duplicate a template.
Get Template: Get a template by ID.
List Templates: List all templates.
Publish Template: Publish a template.
Update Template: Update a template.
Create Topic: Create and email topics to segment your audience.
Delete Topic: Remove an existing topic.
Retrieve Topic: Retrieve a topic by its ID.
List Topics: Retrieve a list of topics for the authenticated user.
Update Topic: Update an existing topic.
Create Webhook: Create a webhook to receive real-time notifications about email events.
Delete Webhook: Remove an existing webhook.
Retrieve Webhook: Retrieve a single webhook for the authenticated user.
List Webhooks: Retrieve a list of webhooks for the authenticated user.
Update Webhook: Update an existing webhook configuration.
Send emails with Base44 and Resend: Learn how to add the Resend integration to your Base44 project.
Send emails with Bolt.new and Resend: Learn how to add the Resend integration to your Bolt.new project.
Chat SDK: Build conversational email experiences using the Vercel Chat SDK and Resend.
Chat SDK Attachments: Handle inbound email attachments with the Chat SDK adapter.
Chat SDK Card Emails: Send rich HTML card emails using the Chat SDK and React Email.
Chat SDK Proactive Outreach: Start new email conversations proactively with the Chat SDK adapter.
Resend CLI: The official command-line tool for Resend. Send emails, manage your account, and develop locally from the terminal.
Resend CLI for AI Agents: How to use the Resend CLI in AI agent workflows.
Send emails with Resend CLI: Learn how to send your first email using the Resend CLI.
Create an API key: Get started sending emails by creating an API key
Introduction: Visualize all the API Keys on the Resend Dashboard.
Managing Contacts: Learn how to work with Contacts with Resend.
Your Resend Audience: Learn how to manage your Contacts and send personalized Broadcasts to them.
Managing Unsubscribed Contacts: Learn how to check and remove recipients who have unsubscribed to your marketing emails.
Contact Properties: Learn how to work with Contact Properties with Resend.
Add to Segment: Include contacts to a segment as part of your Automation.
Condition: Route contacts through different paths based on conditions.
Contact Delete: Remove a contact from your audience in an Automation.
Contact Update: Update contact fields during an Automation.
Custom Events: Define custom events to trigger Automations.
Delay: Pause your Automations with time delays.
Using Automations: Automate emails with custom events.
Runs: Monitor and debug your Automation executions.
Send Email: Trigger templated emails in your Automations.
Trigger: Start your Automations based on custom events.
Wait for Event: Hold your Automations until a specific event is received.
Managing Broadcasts: Send marketing emails efficiently without code.
Performance Tracking: Track your Broadcasts email performance in real-time
Implementing BIMI: Set up BIMI to gain brand recognition by displaying your logo in the inbox.
Implementing DMARC: Implement DMARC to build trust in your domain and protect against email spoofing and unauthorized use of your domain in email messages.
Managing Domains: Visualize all the domains on the Resend Dashboard.
Choosing a Region: Resend offers sending from multiple regions
Open and Click Tracking: Track open and click rates of your emails.
Add an unsubscribe link to transactional emails: Learn how to give email recipients the ability to unsubscribe without searching for the unsubscribe link.
Attachments: Send emails with attachments.
Batch Sending: Send up to 100 emails in a single API call.
Custom Headers: Customize how emails are sent with your own headers.
Deliverability Insights: Improve your deliverability with tailored insights based on your sending.
Email Bounces: Understanding and resolving delivery issues.
Email Suppressions: Understanding and resolving delivery issues.
Embed Inline Images: Send emails with inline images.
Idempotency Keys: Use idempotency keys to ensure that emails are sent only once.
Managing Emails: Learn how to view and manage all sent emails on the Resend Dashboard.
Schedule Email: Send emails at a specific time without additional complexity.
Send Test Emails: Simulate different events by sending test emails.
Managing Tags: Add unique identifiers to emails sent.
Introduction: Learn how to view and troubleshoot API logs.
Process Receiving Attachments: Process attachments from receiving emails.
Custom Receiving Domains: Receive emails using your own domain.
Forward Received Emails: Forward Received emails to another email address.
Get Email Content: Get the body and headers of a received email.
Receiving Emails: Learn how to receive emails via webhooks.
Reply to Receiving Emails: Reply to Receiving emails in the same thread.
Managing Segments: Learn how to create, retrieve, and delete segments.
Migrating from Audiences to Segments: Learn how to migrate from Audiences to Segments
Managing Billing: Manage your account subscription and billing information
Managing Teams: Manage your account across multiple teams
Custom Unsubscribe Page: Customize your unsubscribe page
Using Templates: Learn how to use templates to send emails.
Working with Variables: How to work with custom variables in Templates.
Version History: Best practices for using templates in production environments.
Topics: Give your users more control over their subscription preferences.
How to Store Webhooks Data: Storing your email event data matters. Learn how to set up your own data storage.
DMARC Analyzer: Analyze DMARC XML reports with a free, open-source tool built by Resend.
Email Best Practices Skill: Comprehensive guide for building production-ready email systems with AI agents.
Examples: Explore sample apps for different use cases.
Sending emails with Resend: Resend has a wide range of features for sending both transactional and marketing emails.
Send emails with Devin and Resend: Learn how to install the Resend MCP server in Devin.ai so your agent can send emails, manage contacts, and run broadcasts.
Turn Paper designs into Resend emails: Learn how to combine the Paper MCP server and the Resend MCP server so your agent can turn a Paper design into a template or broadcast in your Resend account.
Integrations: Integrate Resend with the tools you already use.
Introduction: Resend is the email API for developers.
403 Error with Error Code 1010: Learn how to resolve a 403 error caused by a missing User-Agent header when sending requests to the Resend API.
403 Error Using Verified Domain: Learn how to resolve a 403 error caused by using a domain in your API request that doesn't match your verified domain.
403 Error Using resend.dev Domain: Learn how to resolve a 403 error when using the resend.dev domain to send emails to recipients other than your own.
What are Resend account quotas and limits?: Learn what quotas and limits apply to accounts.
Audience Hygiene: How to keep your Audiences in good shape?: Learn strategies for maintaining good audience hygiene and maximizing email deliverability.
Cloudflare: Verify your domain on Cloudflare with Resend.
Do I need 2048-bit DKIM?: Learn why 1024-bit DKIM is enough for transactional and marketing mail, and how it compares to 2048-bit keys.
Does Resend require production approval?: Learn about production access and account limitations on Resend.
Domain Already Registered by Another Account: Resolve the 403 domain already registered error by verifying domain ownership and requesting a release.
Where can I find Resend documents like DPA or W-9?: How to download compliance and tax documents from your Resend account.
DreamHost: Verify your domain on DreamHost with Resend.
Embed the React Email editor in your app: Add the open-source React Email editor to your application: base component, styling, Inspector sidebar, and custom extensions.
How to set up E2E testing with Playwright: End to end testing ensures your entire app flow is fully functioning.
Forward emails with Resend Inbound: Learn how to forward receiving emails to another email address with Resend Inbound.
Gandi: Verify your domain on Gandi with Resend.
Get Started with Resend and Supabase: A quick jumpstart to using Resend with Supabase.
GoDaddy: Verify your domain on GoDaddy with Resend.
Hetzner: Verify your domain on Hetzner with Resend.
Hostinger: Verify your domain on Hostinger with Resend.
How can I change my Resend email address?: How to change the email address associated with your Resend account.
How can I delete my Resend account?: How to request your Resend account and data to be deleted.
How can I delete my Resend team?: How to request your Resend team and team data to be deleted.
Can I receive emails with Resend?: Receive emails with webhooks and process content, attachments, forwarding, and replies.
How do I create an email address or sender in Resend?: Learn how sending from an email address works on Resend.
How do Dedicated IPs work?: When are Dedicated IPs helpful, and how can they be requested.
How do I avoid conflicts with my MX records?: Learn how to avoid conflicts with your existing MX records when setting up a Resend domain.
How do I avoid Gmail's spam folder?: Learn how to improve inbox placement in Gmail.
How do I avoid iCloud's spam folder?: Learn how to improve inbox placement in iCloud Mail.
How do I avoid Outlook's spam folder?: Learn how to improve inbox placement in Outlook.
How do I ensure sensitive data isn't stored on Resend?: Information on how we can help you protect your customer's information.
How do I fix CORS issues?: Information on recommended options to avoid CORS errors when sending emails.
How do I maximize deliverability for Supabase Auth emails?: Everything you should do before you start sending authentication emails with Resend and Supabase.
How do I send with an avatar?: Learn how to show your avatar in the inbox of your recipients.
How do I set up Apple Branded Mail?: Learn how to implement Apple Branded Mail to display your logo in Apple Mail clients.
How to Handle API Keys: Learn our suggested practices for handling API keys.
Introduction: A collection of answers to frequently asked questions.
IONOS: Verify your domain on IONOS with Resend.
Is it better to send emails from a subdomain or the root domain?: Discover why sending emails from a subdomain can be better than using a root domain.
Send emails with n8n and Resend: Learn how to install and use the official Resend node for n8n to send emails, manage contacts, handle webhooks, and more.
Namecheap: Verify your domain on Namecheap with Resend.
Porkbun: Verify your domain on Porkbun with Resend.
AWS Route 53: Verify your domain on Route 53 with Resend.
How to prevent bounces with @privaterelay.appleid.com recipients?: Sending to Apple Private Email Relay requires specific configuration steps to ensure your emails get delivered
Setting up Resend for Multi-Tenant Applications: Learn how to configure Resend for SaaS platforms where tenants send emails from their own domains.
Should I add an unsubscribe link to all of my emails sent with Resend?: Learn best practices about using unsubscribe links.
Squarespace: Verify your domain on Squarespace with Resend.
Strato: Verify your domain on Strato with Resend.
Template emails with React Email: Author email templates as React components and upload them to Resend with the CLI.
Vercel: Verify your domain on Vercel with Resend.
Domain and/or IP Warm-up Guide: Learn how to warm up a domain or IP to avoid deliverability issues.
What attachment types are not supported?: Learn which file attachment extensions you can't send.
What counts as email consent?: Learn what valid email permission looks like and why it matters.
What email addresses to use for testing?: Learn what email addresses are safe to use for testing with Resend
What if an email says delivered but the recipient has not received it?: Learn the steps to take when an email is delivered, but the recipient does not receive it.
What if my domain is not verifying?: Learn what steps to take when your domain doesn't seem to be verifying.
What is Resend Pricing: Learn more about Resend's pricing plans.
What sending feature should I be using?: How to pick between our different sending features depending on your number of recipients and the nature of the message.
What's the difference between Opportunistic TLS vs Enforced TLS?: Understand the different TLS configurations available.
Why Are My Emails Going to Spam?: Troubleshoot and resolve emails landing in spam or being quarantined.
Why are my emails landing on the Suppression List?: Learn why your emails land on the Suppression List and how to remove them.
Why are my open rates not accurate?: Learn why your open rate statistics are not accurate and what you can do about it.
Why and when to use Topics?: Learn when to use Topics to improve deliverability and give recipients control over their email preferences.
Send emails with Leap and Resend: Learn how to add the Resend integration to your Leap.new project.
Send emails with Lovable and Resend: Learn how to add the Resend integration to your Lovable project.
MCP Server: Learn how to use the MCP Server to send emails.
OpenClaw Guide: Learn how to give your AI agent an inbox to send and receive emails.
React Email Skill: Build HTML emails using React components with AI agents.
Send emails with Replit and Resend: Learn how to add the Resend integration to your Replit project.
Resend Skill: Send emails through the Resend API with AI agents.
Official SDKs: Open source client libraries for your favorite platforms.
Security: An overview of Resend security features and practices.
Send emails with Astro: Learn how to send your first email using Astro, Resend, and Node.js.
Send Auth0 transactional emails with Resend: Learn how to send Auth0 transactional emails through Resend using the official integration.
Send emails with AWS Lambda: Learn how to send your first email using AWS Lambda.
Send emails with Axum: Send your first email using Axum and the Resend Rust SDK.
Send emails with Bun: Learn how to send your first email using Bun and the Resend Node.js SDK.
Send emails with Cloudflare Workers: Learn how to send your first email using Cloudflare Workers.
Send emails using Customer.io with SMTP: Learn how to integrate Customer.io with Resend SMTP.
Send emails with Deno Deploy: Learn how to send your first email using Deno Deploy.
Send emails with Django: Learn how to send your first email using Django and the Resend Python SDK.
Send emails using Django with SMTP: Learn how to integrate Django with Resend SMTP.
Send emails with .NET: Learn how to send your first email using the Resend .NET SDK.
Send emails with Elixir: Learn how to send your first email using the Resend Elixir SDK.
Send emails with Encore: Learn how to send your first email using Encore and the Resend Go SDK.
Send emails with Encore: Learn how to send your first email using Encore and the Resend Node.js SDK.
Send emails with Express: Learn how to send your first email using Express and the Resend Node.js SDK.
Send emails with FastAPI: Learn how to send your first email using FastAPI and the Resend Python SDK.
Send emails with Flask: Learn how to send your first email using Flask and the Resend Python SDK.
Send emails with Go: Learn how to send your first email using the Resend Go SDK.
Send emails with Hono: Learn how to send your first email using Hono and the Resend Node.js SDK.
Send emails with Java: Learn how to send your first email using the Resend Java SDK.
Send emails with Laravel: Learn how to send your first email using Laravel.
Send emails using Laravel with SMTP: Learn how to send your first email using Laravel with SMTP.
Send emails using Liferay with SMTP: Learn how to integrate Liferay with Resend SMTP.
Send emails using Metabase with SMTP: Learn how to integrate Metabase with Resend SMTP.
Send emails using NextAuth with SMTP: Learn how to send your first email using NextAuth.
Send emails with Next.js: Learn how to send your first email using Next.js and the Resend Node.js SDK.
Send emails with Node.js: Learn how to send your first email using the Resend Node.js SDK.
Send emails using Nodemailer with SMTP: Learn how to send your first email using Nodemailer with SMTP.
Send emails with Nuxt: Learn how to send your first email using Nuxt and the Resend Node.js SDK.
Send emails with Phoenix: Learn how to send your first email using Phoenix and the Resend Elixir SDK.
Send emails with PHP: Learn how to send your first email using the Resend PHP SDK.
Send emails using PHPMailer with SMTP: Learn how to send your first email using PHPMailer with SMTP.
Send emails with Python: Learn how to send your first email using the Resend Python SDK.
Send emails with Rails: Learn how to send your first email using Rails and the Resend Ruby SDK.
Send emails using Rails with SMTP: Learn how to integrate Rails with Resend SMTP.
Send emails with Railway: Learn how to send your first email using Railway and the Resend Node.js SDK.
Send emails with RedwoodJS: Learn how to send your first email using Redwood.js and the Resend Node.js SDK.
Send emails with Remix: Learn how to send your first email using Remix and the Resend Node.js SDK.
Send emails using Retool with SMTP: Learn how to integrate Retool with Resend SMTP.
Send emails with Ruby: Learn how to send your first email using the Resend Ruby SDK.
Send emails with Rust: Learn how to send your first email using the Resend Rust SDK.
Send emails with Sinatra: Learn how to send your first email using Sinatra and the Resend Ruby SDK.
Send emails with SMTP: Learn how to integrate Resend via SMTP.
Send emails with Supabase Edge Functions: Learn how to send your first email using Supabase Edge Functions.
Send emails using Supabase with SMTP: Learn how to integrate Supabase Auth with Resend SMTP.
Send emails with SvelteKit: Learn how to send your first email using SvelteKit and the Resend Node.js SDK.
Send emails with Symfony: Learn how to send your first email using the Symfony Resend Mailer Bridge.
Send emails with Vercel Functions: Learn how to send your first email using Vercel Functions.
Send emails using WordPress with SMTP: Learn how to send your first email using Wordpress.
Send emails with v0 and Resend: Learn how to add the Resend integration to your v0 project.
contact.created: Received when a contact is created.
contact.deleted: Received when a contact is deleted.
contact.updated: Received when a contact is updated.
domain.created: Received when a domain is created.
domain.deleted: Received when a domain is deleted.
domain.updated: Received when a domain is updated.
email.bounced: Received when an email bounces.
email.clicked: Received when an email link is clicked.
email.complained: Received when an email is marked as spam.
email.delivered: Received when an email is delivered.
email.delivery_delayed: Received when an email delivery is delayed.
email.failed: Received when an email fails to send.
email.opened: Received when an email is opened.
email.received: Received when an inbound email is received.
email.scheduled: Received when an email is scheduled to be sent.
email.sent: Received when an email is sent.
email.suppressed: Received when an email is suppressed.
Event Types: List of supported event types and their payload.
Webhook Ingester: A self-hosted solution to store all your Resend webhook events in your own database.
Managing Webhooks: Use webhooks to notify your application about events from Resend.
Retries and Replays: Learn how to use the retries and replays to handle webhook failures.
Verify Webhooks Requests: Learn how to use the signing secret to verify your webhooks.