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               Question by 
               ayushshreshthi41 · Dec 23, 2020 at 02:07 PM · 
                unity 5exceptionmail  
              
 
              SmtpException: 535-5.7.8 Username and Password not accepted
I am developing a project for android with unity 2020.1 first I have made a function that sends a mail with some code to let the user login. and it worked fine. but now after some days(4-5 days), I keep getting this error SmtpException: 535-5.7.8 Username and Password not accepted
then I changed my password again I got this error then I created a new Gmail account and used it but still getting this error
note - I am using my credentials correctly.
     MailMessage mail = new MailMessage();
     SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
     SmtpServer.Timeout = 10000;
     SmtpServer.DeliveryMethod = SmtpDeliveryMethod.Network;
     SmtpServer.UseDefaultCredentials = false;
     SmtpServer.Port = 587;
     mail.From = new MailAddress("mygmail");
     mail.To.Add(new MailAddress(emailInput.text));
     emailToDb = emailInput.text.ToString();
     mail.Subject = " ";
     int randNom = UnityEngine.Random.Range(1111, 999999);
     codeLogin = randNom;
     mail.Body = randNom.ToString();
     SmtpServer.Credentials = new System.Net.NetworkCredential("mygmail", "mypassword") as ICredentialsByHost; SmtpServer.EnableSsl = true;
     ServicePointManager.ServerCertificateValidationCallback = delegate (object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
     {
         return true;
     };
     mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
     SmtpServer.Send(mail);
 
              
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