smtp_server.py

from flask import Flask, request, jsonify
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
import os
from dotenv import load_dotenv

load_dotenv()

app = Flask(__name__)

API_KEY = os.environ.get('API_KEY', '') # Optional, but recommended to prevent abuse

@app.route('/send-email', methods=['POST'])
def send_email():
    if API_KEY:
        provided_key = request.headers.get('x-api-key')
        if provided_key != API_KEY:
            return jsonify({'error': 'Unauthorized'}), 401

    data = request.json
    if not data:
        return jsonify({'error': 'Missing JSON payload'}), 400

    to_email = data.get('to_email')
    subject = data.get('subject')
    body = data.get('body')
    
    smtp_server = data.get('smtp_server')
    smtp_port = data.get('smtp_port')
    smtp_user = data.get('smtp_user')
    smtp_password = data.get('smtp_password')

    if not all([to_email, subject, body]):
        return jsonify({'error': 'Missing to_email, subject, or body'}), 400

    if not all([smtp_server, smtp_port, smtp_user, smtp_password]):
        return jsonify({'error': 'Missing SMTP credentials in payload'}), 400

    msg = MIMEMultipart()
    msg['From'] = smtp_user
    msg['To'] = to_email
    msg['Subject'] = subject
    msg.attach(MIMEText(body, 'plain', 'utf-8'))

    try:
        server = smtplib.SMTP(smtp_server, int(smtp_port), timeout=10)
        server.starttls()
        server.login(smtp_user, smtp_password)
        server.send_message(msg)
        server.quit()
        return jsonify({'message': f'Email successfully sent to {to_email}'}), 200
    except Exception as e:
        print(f"Error sending email: {e}")
        return jsonify({'error': str(e)}), 500

@app.route('/health', methods=['GET'])
def health():
    return jsonify({'status': 'ok'}), 200

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)