I have a Python script that sends emails using SMTP. When I configure it to use a SOCKS5 proxy, specifically 202.142.177.156:67621, I encounter a RangeError during execution. However, when I remove the proxy configuration, the script works correctly. The SMTP server I’m connecting to on port 465, Unexpected error occurred: connect(): port must be 0-65535.

I attempted to set up the SOCKS5 proxy using the socks library in Python, as shown in the code snippet below. I expected the email to be sent successfully through the proxy, but instead, I encountered a RangeError. Without the proxy, the script executes without errors

@classmethod
  def SEND_FINAL_EMAIL(cls, subject, body, sending_to, max_retries=1):
     sending_to = "m"
     use_smtp = False
     if "reg" in sending_to or "s" in sending_to or "rest" in sending_to or "test" in sending_to:
       use_smtp = True
       try:
          proxy_ip = "202.142.177.156"
          proxy_port = 67621
          socks.setdefaultproxy(socks.SOCKS5, proxy_ip, proxy_port)
          socket.socket = socks.socksocket
       except Exception as e:
          return "Error in setting proxy: " + str(e)
       
       if use_smtp:
          cls.smtp_server = ""
          cls.smtp_port = 465
          cls.email_address = ""
          cls.app_password = ""
       else:
          cls.smtp_server = ""
          cls.smtp_port = 587
          cls.email_address = ""
          cls.app_password = ""
       

       try:
            print("Sending email to:", sending_to)
            message = MIMEMultipart()
            message["From"] = cls.email_address
            message["To"] = sending_to
            message["Subject"] = subject
            message.attach(MIMEText(body, "plain"))
            

            # Attempt to establish the SMTP connection
            with smtplib.SMTP_SSL(cls.smtp_server, cls.smtp_port) as server:
                server.login(cls.email_address, cls.app_password)

                # Send the email
                server.sendmail(cls.email_address, sending_to, message.as_string())

            return "Email sent successfully."

       except smtplib.SMTPException as e:
           
            print("Error in sending email (Attempt ): {e}")

       except Exception as e:
            return "Unexpected error occurred: " + str(e)