API de correo gratis para enviar desde tu código

curl -X POST https://api.postal.so/emails \
  -H "Authorization: Bearer $POSTAL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "Loja Exemplo <[email protected]>",
    "to": ["[email protected]"],
    "subject": "Tu pedido #10482 salió para la entrega",
    "html": "<p>El pedido <b>#10482</b> está en camino.</p>"
  }'

import { Postal } from 'postal-so'

const postal = new Postal() // lee POSTAL_API_KEY

const { id } = await postal.emails.send(
  {
    from: 'Mi empresa <[email protected]>',
    to: '[email protected]',
    subject: '¡Bienvenido!',
    html: '<p>Qué bueno tenerte por aquí.</p>',
    text: 'Qué bueno tenerte por aquí.',
  },
  { idempotencyKey: 'welcome-42' },
)

use Postal\Client;

$postal = new Client(); // lee POSTAL_API_KEY

$result = $postal->emails->send([
    'from' => 'Mi empresa <[email protected]>',
    'to' => '[email protected]',
    'subject' => '¡Bienvenido!',
    'html' => '<p>Qué bueno tenerte por aquí.</p>',
]);

import os
import requests

response = requests.post(
    "https://api.postal.so/emails",
    headers={"Authorization": f"Bearer {os.environ['POSTAL_API_KEY']}"},
    json={
        "from": "Loja Exemplo <[email protected]>",
        "to": ["[email protected]"],
        "subject": "Tu pedido #10482 salió para la entrega",
        "html": "<p>El pedido <b>#10482</b> está en camino.</p>",
    },
    timeout=10,
)
data = response.json()

{
  "from": "Loja Exemplo <[email protected]>",
  "to": "[email protected]",
  "template": {
    "id": "order-shipped",
    "variables": { "NAME": "Ana", "ORDER": "10482" }
  }
}