Automatizar emails masivos

Enviar emails personalizados masivamente es una de las automatizaciones mas utiles para negocios.

Casos de uso: • Newsletters personalizadas • Facturas automaticas • Notificaciones a clientes • Cold outreach para ventas • Reportes diarios a tu equipo

Librerias: • smtplib (built-in): SMTP basico • email (built-in): Crear emails con formato • yagmail: Wrapper simple para Gmail • Resend: API moderna, 100 emails/dia gratis

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart

def send_email(to, subject, body, smtp_config):
    """Enviar email con SMTP"""
    msg = MIMEMultipart()
    msg["From"] = smtp_config["user"]
    msg["To"] = to
    msg["Subject"] = subject
    msg.attach(MIMEText(body, "html"))
    
    with smtplib.SMTP_SSL(smtp_config["host"], smtp_config["port"]) as server:
        server.login(smtp_config["user"], smtp_config["password"])
        server.send_message(msg)
    print(f"Email enviado a {to}")

def send_bulk_personalized(recipients, template, smtp_config):
    """Enviar emails personalizados masivamente"""
    for person in recipients:
        body = template.format(**person)
        subject = f"Hola {person['name']}, tenemos algo para ti"
        send_email(person["email"], subject, body, smtp_config)
        import time
        time.sleep(2)  # No enviar demasiado rapido

# Ejemplo
recipients = [
    {"name": "Carlos", "email": "carlos@mail.com", "product": "Pro"},
    {"name": "Ana", "email": "ana@mail.com", "product": "Starter"},
]

template = """
<h2>Hola {name}!</h2>
<p>Tu plan <strong>{product}</strong> esta listo.</p>
<p>Gracias por elegirnos.</p>
"""

# smtp = {"host": "smtp.gmail.com", "port": 465, "user": "tu@gmail.com", "password": "app_password"}
# send_bulk_personalized(recipients, template, smtp)