i'm writing a C# email application which is currently being designed for use with Gmail so I can test authentication. However I'm getting an error which doesn't seem to make much sense as I am setting SSL to true and using a user and password.
Error Message: System.Net.Mail.SmtpException: 'The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at'
using System;
using System.Net;
using System.Net.Mail;
namespace EmailSendingProgram
{
public class EmailSendingClass
{
public static void Main(string[] args)
{
Console.WriteLine("Type your Gmail Address: ");
string from = Console.ReadLine();
Console.WriteLine("Type your Gmail Password: ");
string password = Console.ReadLine();
Console.WriteLine("Type the Email Address you wish to send to: ");
string to = Console.ReadLine();
Console.WriteLine("Type the Subject of the email: ");
string subject = Console.ReadLine();
Console.WriteLine("Type or paste in your email (either text or HTML): ");
string body = Console.ReadLine();
EmailSendingClass email = new EmailSendingClass();
email.Send(from, password, to, subject, body);
}
/// handles sending the email
/// hardcoded to work with gmail just change the CreateSmtpClient from
/// "smtp.gmail.com", 587 to whatever you want to use
public void Send(string from, string password, string to, string subject, string body)
{
var message = CreateMailMessage(from, to, subject, body);
// Host and Port setup for use with Gmail
using (SmtpClient client = CreateSmtpClient("smtp.gmail.com", 587, from, password))
{
client.Send(message);
}
}
/// Defines the SmtpClient for the mail message
/// setups up the network credentials to send the email
private SmtpClient CreateSmtpClient(string host, int port, string from, string password)
{
SmtpClient client = null;
client = new SmtpClient()
{
Host = host,
Port = port,
EnableSsl = true,
Credentials = new NetworkCredential(from, password)
};
return client;
}
/// defines what is contained in the email and where it will be sent
/// also makes all messages send as HTML
private MailMessage CreateMailMessage(string from, string to, string subject, string body)
{
MailMessage message = null;
message = new MailMessage(from, to)
{
Subject = subject,
Body = body
};
message.IsBodyHtml = true;
return message;
}
}
}
I understand that something is being done incorrectly with the authentication but I can't seem to figure out what specifically. So any help would be appreciated.
