unable to send email from android device

Hello friends. I am desperate for an answer please

I am using a lenovo headset to send emails. it works on android. The email is sent from my editor but not from the headset. her is my code. I have tried ti change the label text and see, the code seems to work until the code for setting the email address.

What do you think may be going wrong after this point.

using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; //using System.Net; //using System.Net.Mail; using System.Net.Security; using System.Security.Cryptography.X509Certificates; using UnityEngine; using EASendMail; using System.Text; using UnityEngine.SceneManagement; using UnityEngine.UI;

public class mailme : MonoBehaviour {

 SmtpMail oMail = new SmtpMail("TryIt");
 SmtpClient oSmtp = new SmtpClient();
 private string mtcid;
 private string mtclevel;
 private string mailscore;
 private Text vtitle;
 Dropdown m_Dropdown;
 string m_level;
 int m_DropdownValue;
 public Text labeltext;
   


 public void SendMail()
 {
     if ((GameObject.Find("InputField").GetComponent<InputField>().text == "") || (GameObject.FindGameObjectWithTag("dropdown").GetComponentInChildren<Dropdown>().value == 0))
     {
         Debug.Log("Enter MTC ID");

         labeltext.text = "Enter ID and Level!";

     }
     else if (GameObject.FindGameObjectWithTag("dropdown").GetComponentInChildren<Dropdown>().value == 0)
     {
         labeltext.text = "Enter ID and Level!";
         Debug.Log("Select a level");
     }
     else
     {
         m_Dropdown = GameObject.FindGameObjectWithTag("dropdown").GetComponentInChildren<Dropdown>();
         Debug.Log("Starting Dropdown Value : " + m_Dropdown.value);
         m_DropdownValue = m_Dropdown.value;
         m_level = m_Dropdown.options[m_DropdownValue].text;
         Debug.Log(m_level);
         mtcid = GameObject.Find("InputField").GetComponent<InputField>().text;
         //  mtclevel = GameObject.Find("KeyboardPanel").GetComponentInChildren<Dropdown>().options[index].text.ToString();
         mtclevel = m_level;
         mailscore = GameObject.Find("Textscore").GetComponent<Text>().text.ToString();
         vtitle = GameObject.Find("VidTitle").GetComponent<Text>();
         Debug.Log(vtitle.text);
     **//The code works in headset until this comment below
        //labeltext.text = "Check3";**
     // Set sender email address, please change it to yours
        oMail.From = "sender@gmail.com";
     // Set recipient email address, please change it to yours
        oMail.To = "receiver@abc.com";
     // Set email subject
        oMail.Subject = "LRC VR Video Result for MTC ID " + mtcid;
       
         // Set email body
         oMail.TextBody = "Hi, \n Please find the Score of the VR Video for user with MTC ID " + mtcid + " below:\n\n Video Title: " + vtitle.text + "\n\nMTC ID: " + mtcid + "\nLEVEL: " + mtclevel + "\n" + mailscore;
    
     // Your SMTP server address
     SmtpServer oServer = new SmtpServer("smtp.gmail.com");
     
     // User and password for ESMTP authentication, if your server doesn't require
     // User authentication, please remove the following codes.
     oServer.User = "sender@gmail.com";
         oServer.Password = "password";

     // If your smtp server requires TLS connection, please add this line
         oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;
         oServer.Port = 465;
         oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;

     try
     {
         Console.WriteLine("start to send email ...");
         oSmtp.SendMail(oServer, oMail);
         Debug.Log("email was sent successfully!");

         SceneManager.LoadScene("SelectLevel");

     }
     catch (Exception ep)
     {
         labeltext.text = "Failed!";
         Console.WriteLine("failed to send email with the following error:");
         Console.WriteLine(ep.Message);
         SceneManager.LoadScene("SelectLevel");
     }

 }

} }