when i send mail on button click then error show:
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required
my code:-
MailMessage msg = new MailMessage();
msg.From = new MailAddress("test@gmail.com");
msg.To.Add("test@gmail.com");
msg.Subject = "test";
msg.Body = "Test Content";
//msg.Priority = MailPriority.High;
using (SmtpClient client = new SmtpClient())
{
client.EnableSsl = true;
client.UseDefaultCredentials = false;
client.Credentials = new NetworkCredential("test@gmail.com", "mypassword");
client.Host = "smtp.gmail.com";
client.Port = 587;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
...
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