feat: add free email sending with Resend API

app/main.py

@@ -18,9 +18,7 @@ import telebot
 from telebot import types
 import markdown
 from dotenv import load_dotenv
-import smtplib
-from email.mime.text import MIMEText
-from email.mime.multipart import MIMEMultipart
+import resend
 
 # Cargar variables de entorno desde .env
 load_dotenv()
@@ -419,31 +417,29 @@ def logout():
     return redirect(url_for('index'))
 
 def send_email(to_email, subject, body):
-    """Envía un correo electrónico usando SMTP."""
-    smtp_server = os.getenv("SMTP_SERVER")
-    smtp_port = os.getenv("SMTP_PORT")
-    smtp_user = os.getenv("SMTP_USER")
-    smtp_password = os.getenv("SMTP_PASSWORD")
-
-    if not all([smtp_server, smtp_port, smtp_user, smtp_password]):
-        print("[EMAIL ERROR] Falta configuración SMTP en variables de entorno.")
+    """Envía un correo electrónico usando Resend (100% gratis hasta 100 emails/día)."""
+    resend_api_key = os.getenv("RESEND_API_KEY")
+    from_email = os.getenv("FROM_EMAIL", "onboarding@resend.dev")  # Email verificado en Resend
+
+    if not resend_api_key:
+        print("[EMAIL ERROR] Falta RESEND_API_KEY en variables de entorno.")
         return False
 
     try:
-        msg = MIMEMultipart()
-        msg['From'] = smtp_user
-        msg['To'] = to_email
-        msg['Subject'] = subject
-        msg.attach(MIMEText(body, 'plain'))
-
-        server = smtplib.SMTP(smtp_server, int(smtp_port))
-        server.starttls()
-        server.login(smtp_user, smtp_password)
-        server.send_message(msg)
-        server.quit()
+        resend.api_key = resend_api_key
+        
+        params = {
+            "from": from_email,
+            "to": [to_email],
+            "subject": subject,
+            "text": body,
+        }
+        
+        email_response = resend.Emails.send(params)
+        print(f"[EMAIL SUCCESS] Correo enviado a {to_email}: {email_response}")
         return True
     except Exception as e:
-        print(f"[EMAIL ERROR] Error enviando correo: {e}")
+        print(f"[EMAIL ERROR] Error enviando correo con Resend: {e}")
         return False
 
 @app.route('/forgot-password', methods=['GET', 'POST'])

app/requirements.txt

@@ -1,9 +1,11 @@
 flask
-flask-socketio
-python-gitlab
-requests
-pyTelegramBotAPI
-python-dotenv
+fFlask-SocketIO==5.3.4
+eventlet==0.33.3
+python-gitlab==3.15.0
+pyTelegramBotAPI==4.12.0
+markdown==3.4.4
+python-dotenv==1.0.0
+resend==0.8.0
 gunicorn
 eventlet
 markdown