How to resolve this issue when email is not verified?

Question

Hi Team

 

I have this method and have enabled my authentication on my gmail, still get this exception;

public Task SendAsync(IdentityMessage message)
{
// Plug in your email service here to send an email.
var mailMessage = new MailMessage();
mailMessage.To.Add(new MailAddress(message.Destination));
mailMessage.From = new MailAddress("[email protected]");
mailMessage.Subject = message.Subject;
mailMessage.IsBodyHtml = true;
mailMessage.Body = message.Body;
using (var smtp = new SmtpClient())
{
var credential = new NetworkCredential
{
UserName = "[email protected]",
Password = "***"
};
try
{
smtp.Host = "smtp.gmail.com";
smtp.Port = 587;
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
smtp.Credentials = credential;
smtp.Send(mailMessage);
}
catch (Exception ex)
{
throw;
}
}
return Task.FromResult(0);
}
}

System.Net.Mail.SmtpException: 'The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Authentication Required. Learn more at'