npm install lettr

LETTR_API_KEY=your-api-key

import { Lettr } from 'lettr';

const lettr = new Lettr(process.env.LETTR_API_KEY!);

export default defineEventHandler(async (event) => {
  const { to, subject, html } = await readBody(event);

  try {
    const data = await lettr.emails.send({
      from: 'you@example.com',
      to: [to],
      subject,
      html
    });

    return data;
  } catch (error) {
    throw createError({
      statusCode: 500,
      message: error.message
    });
  }
});

// modules/lettr.ts
import { defineNuxtModule, addServerHandler } from '@nuxt/kit';

export default defineNuxtModule({
  meta: {
    name: 'lettr',
    configKey: 'lettr'
  },
  defaults: {
    apiKey: ''
  },
  setup(options, nuxt) {
    nuxt.options.runtimeConfig.lettr = {
      apiKey: options.apiKey || process.env.LETTR_API_KEY
    };
  }
});

<!-- components/ContactForm.vue -->
<template>
  <form @submit.prevent="sendEmail">
    <input v-model="form.name" placeholder="Your name" required />
    <input v-model="form.email" type="email" placeholder="Your email" required />
    <textarea v-model="form.message" placeholder="Your message" required />
    <button type="submit" :disabled="loading">
      {{ loading ? 'Sending...' : 'Send Message' }}
    </button>
  </form>
</template>

<script setup lang="ts">
const form = reactive({
  name: '',
  email: '',
  message: ''
});

const loading = ref(false);

async function sendEmail() {
  loading.value = true;
  
  try {
    await $fetch('/api/email', {
      method: 'POST',
      body: {
        to: 'team@example.com',
        subject: `Contact from ${form.name}`,
        html: `
          <h2>New Contact Message</h2>
          <p><strong>From:</strong> ${form.name} (${form.email})</p>
          <p><strong>Message:</strong></p>
          <p>${form.message}</p>
        `
      }
    });
    
    // Reset form
    form.name = '';
    form.email = '';
    form.message = '';
    
    alert('Message sent successfully!');
  } catch (error) {
    alert('Failed to send message');
  } finally {
    loading.value = false;
  }
}
</script>

// server/utils/email.ts
import { Lettr } from 'lettr';

let lettr: Lettr;

export function useLettr() {
  if (!lettr) {
    const config = useRuntimeConfig();
    lettr = new Lettr(config.lettr.apiKey);
  }
  return lettr;
}

// server/api/welcome.post.ts
export default defineEventHandler(async (event) => {
  const { email, name } = await readBody(event);
  const lettr = useLettr();

  await lettr.emails.send({
    from: 'welcome@example.com',
    to: [email],
    subject: 'Welcome!',
    html: `<p>Welcome, ${name}!</p>`
  });

  return { success: true };
});