Plainform

To use Resend, you must configure the RESEND_API_KEY and RESEND_AUDIENCE_ID in your .env file, validated by t3-env, and set up DNS records for reliable email delivery. The Resend client is initialized in lib/resend to enable email sending and audience management.

Steps to Set Up Resend

Create a Resend Account

Sign up at Resend and create a new account.
Access the Resend dashboard to obtain API keys and audience settings.

Obtain Resend API Key and Audience ID

Navigate to API Keys in the Resend dashboard and generate a key.
Create an audience in Audiences for newsletter subscribers and copy the Audience ID.

Configure Environment Variables

Add these to your .env (or .env.local) file:

Env Variable	Type	Default
`RESEND_API_KEY`	`string`	`re_xxxx`
`RESEND_AUDIENCE_ID`	`string`	-

Ensure .env is in .gitignore to protect sensitive keys.

Set Up DNS for Email Deliverability

In the Resend dashboard, go to Domains and add your domain (e.g., yourapp.com).
Copy the provided DNS records (e.g., DKIM, SPF, DMARC) and add them to your domain registrar (e.g., Namecheap, GoDaddy).
Verify the domain in Resend to ensure emails avoid spam folders.

Initialize the Resend Client

Plainform Dev includes the Resend client in lib/resend/resend.ts:

@/lib/resend/resend.ts

import { Resend } from 'resend';

export const resend = new Resend(process.env.RESEND_API_KEY);

Verify Configuration

Run npm run dev to validate environment variables via t3-env (in env.mjs).
If validation fails, check your API key and audience ID in the Resend dashboard.

For advanced configurations, such as bucket policies or CORS settings, consult the Resend Documentation.

Setup & Configuration