The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Authentication Required.
try {
MailMessage message = new MailMessage();
SmtpClient smtp = new SmtpClient();
message.From = new MailAddress("FromMailAddress");
message.To.Add(new MailAddress("ToMailAddress"));
message.Subject = "Test";
message.IsBodyHtml = true; //to make message body as html
message.Body = htmlString;
smtp.Port = 587;
smtp.Host = "smtp.gmail.com"; //for gmail host
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new NetworkCredential("FromMailAddress", "password");
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.Send(message);
} catch (Exception) {}
Less Secure is no more. How can I fix this error?
