> ## Documentation Index > Fetch the complete documentation index at: https://dhiwisepvtltd-5e04e6a4.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Resend > Send transactional email from your Rocket.new app with Resend, including welcome messages, password resets, and order confirmations from a prompt. Connect Resend and describe the email flow you want in chat. Rocket generates the complete implementation: email templates, send logic, and secure API integration. ## What you can do > **Welcome emails** > > Personalized welcome emails triggered the moment a user signs up, with onboarding steps and branding. > **Password reset flows** > > Secure, branded password reset emails instead of the default Supabase template. > **Order confirmations** > > Receipt emails after a purchase with order details, totals, and receipt number. > **Newsletter signups** > > Collect emails and add subscribers to a mailing list using Resend Audiences. > **Team invitation emails** > > Branded invite emails with a unique signup or join link when adding team members. ## Before you connect You need your **API key** from the Resend Dashboard. > **Create or copy your Resend API key** > > [Open](https://resend.com/docs/dashboard/api-keys/introduction#add-api-key) > [!WARNING] > > Never paste your Resend API key directly into chat. Always use the secure connection popup. If your key has been exposed, rotate it immediately from the Resend dashboard. > [!NOTE] > > Resend works best paired with [Supabase](https://dhiwisepvtltd-5e04e6a4.mintlify.site/build/connectors/supabase/overview.md) for linking emails to authenticated users. You can also route Supabase Auth emails through Resend's SMTP for full branding control. ## Connect Resend **Web Browser** You can connect from two places - both open the same popup. **Option 1: From chat** Type a prompt that mentions Resend - for example, `Connect Resend and send a welcome email when a user signs up`. Rocket detects the intent and shows a **Connect** button inline. Click it and the popup opens. ![Resend connection prompt in the Rocket chat panel.](https://mintlify.s3.us-west-1.amazonaws.com/dhiwisepvtltd-5e04e6a4/images/build/connectors/resend/web-browser/resend-chat-light.webp) ![Resend connection prompt in the Rocket chat panel.](https://mintlify.s3.us-west-1.amazonaws.com/dhiwisepvtltd-5e04e6a4/images/build/connectors/resend/web-browser/resend-chat-dark.webp) Resend connection prompt in chat **Option 2: From the Connectors tab** Click the **`...`** button in the preview toolbar, then select **Connectors**. Open Connectors from the toolbar Click the **Resend** card, then click **Connect**. ![Connectors panel showing the Resend card with a Connect button.](https://mintlify.s3.us-west-1.amazonaws.com/dhiwisepvtltd-5e04e6a4/images/build/connectors/resend/web-browser/resend-connectors-tab-light.webp) ![Connectors panel showing the Resend card with a Connect button.](https://mintlify.s3.us-west-1.amazonaws.com/dhiwisepvtltd-5e04e6a4/images/build/connectors/resend/web-browser/resend-connectors-tab-dark.webp) Resend card in the Connectors panel **After clicking Connect** A popup opens. Paste your **API key**, then click **Save**. A green dot appears next to Resend when the connection is active. ![Resend API key input popup.](https://mintlify.s3.us-west-1.amazonaws.com/dhiwisepvtltd-5e04e6a4/images/build/connectors/resend/web-browser/resend-popup-light.webp) ![Resend API key input popup.](https://mintlify.s3.us-west-1.amazonaws.com/dhiwisepvtltd-5e04e6a4/images/build/connectors/resend/web-browser/resend-popup-dark.webp) Paste your Resend API key in the popup **Update or disconnect** Go to [**Connectors > Resend**](#connect-resend). Update your key or click **Disconnect** to remove the integration. ![Resend integration showing connected state with a Disconnect button.](https://mintlify.s3.us-west-1.amazonaws.com/dhiwisepvtltd-5e04e6a4/images/build/connectors/resend/web-browser/resend-disconnect-light.webp) ![Resend integration showing connected state with a Disconnect button.](https://mintlify.s3.us-west-1.amazonaws.com/dhiwisepvtltd-5e04e6a4/images/build/connectors/resend/web-browser/resend-disconnect-dark.webp) Disconnect Resend **Mobile App** You can connect from two places - both open the same popup. **Option 1: From chat** Type a prompt that mentions Resend. Rocket detects the intent, shows a **Connect** button, and the popup opens when you tap it. **Option 2: From the Connectors tab** 1. Tap the **More** button in the header. 2. Tap **Integrations**. 3. Tap the **Resend** card, then tap **Connect**. **After tapping Connect** A popup opens. Paste your **API key**, then tap **Done**. A green dot appears next to Resend when the connection is active. **Update or disconnect** Go to **Integrations > Resend**. Update your key or tap **Disconnect** to remove the integration. ## Example prompts | Use case | Prompt | | - | - | | Welcome email | `Send a welcome email through Resend when a new user signs up with Supabase.` | | Password reset | `Route Supabase password reset emails through Resend with custom branding.` | | Order confirmation | `After a Stripe payment, send a receipt email through Resend with the order total.` | | Newsletter signup | `Add a newsletter form that saves emails to Supabase and adds them to my Resend Audience.` | | Team invite | `Send an invitation email through Resend with a unique join link when I invite a team member.` | | Email verification | `Send a verification email through Resend with a 6-digit code when a user registers.` | | Weekly digest | `Send a weekly digest email every Monday with the user's activity summary from Supabase.` | | Abandoned cart | `If a user adds items to cart but does not check out within 24 hours, send a reminder email through Resend.` | | Feedback request | `Send a feedback request email through Resend 3 days after a user completes onboarding.` | | Custom HTML email | `Create a styled HTML email template in Resend with our logo, brand colors, and a CTA button.` | ## Tips * **Supabase is recommended.** Rocket links Resend emails to Supabase user accounts for the best experience. Most auth email flows (welcome, password reset) work best with Supabase connected. * **SMTP routing for auth emails.** Route Supabase Auth emails through Resend for custom branding. See the [Resend + Supabase SMTP guide](https://resend.com/docs/send-with-supabase-smtp). * **Resend Audiences for marketing.** Resend supports newsletters and marketing emails through Audiences and Broadcasts, with built-in analytics and unsubscribe handling. * **API key security.** Your key is encrypted at rest and never exposed in your project code. Always use the secure integration flow to connect. * **One Resend account per project.** Each Rocket project connects to one Resend API key. Use different projects for different Resend accounts. * **Free plan sender limits.** Free Resend accounts can only send from the default account email. To use a custom domain, upgrade your Resend plan, verify the domain, and update the `from` field in your Supabase Edge Function. > **How to change the sender email in your Supabase Edge Function** > > Once your domain is verified in Resend, update the `from` field in the Edge Function that handles sending. > > 1. Go to the [Supabase Dashboard](https://supabase.com/dashboard) and open your project. > 2. Click **Edge Functions** in the left sidebar. > 3. Open the function that handles email sending (for example, `send-welcome-email`). > 4. Click the **Code** tab. > 5. Find the `resend.emails.send` call and update the `from` field: > > ```typescript theme={null} > await resend.emails.send({ > from: "noreply@yourdomain.com", // your verified domain address > to: recipientEmail, > subject: "...", > html: "...", > }); > ``` > > 6. Click **Deploy** (or **Redeploy**) to apply the change. > > 7. Trigger the function to confirm the email arrives from the new address. Use the **Logs** tab if anything fails. > > > [!NOTE] > > > > If you route Supabase Auth emails (password reset, magic link) through Resend SMTP, the sender address for those is set separately under **Project Settings → Authentication → SMTP Settings** in the Supabase Dashboard, not in an Edge Function. ## What's next? > **[Stripe](https://dhiwisepvtltd-5e04e6a4.mintlify.site/build/connectors/stripe.md)** > > Send order confirmation and receipt emails after Stripe payments with Resend. > **[Supabase](https://dhiwisepvtltd-5e04e6a4.mintlify.site/build/connectors/supabase/overview.md)** > > Recommended for linking emails to authenticated users and routing auth emails through Resend. > **[SendGrid](https://dhiwisepvtltd-5e04e6a4.mintlify.site/build/connectors/sendgrid.md)** > > An alternative email integration if you prefer SendGrid's platform. > **[Build a SaaS app](https://dhiwisepvtltd-5e04e6a4.mintlify.site/learn/recipes/saas.md)** > > Full recipe: Supabase + Stripe + Resend + Netlify to build a complete SaaS product. 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