Unable to send hotmail from C#

Question

Here is my code:

MailAddress to = new MailAddress("MAIL@hotmail.com");
MailAddress from = new MailAddress("MAIL@hotmail.com");
MailMessage message = new MailMessage(from, to);
message.Subject = "Message du siute as-quebec.net de: " + EmailToSend.Email;
message.Body = EmailToSend.Message;
SmtpClient client = new SmtpClient("smtp.live.com");
client.Credentials = new System.Net.NetworkCredential("MAIL@hotmail.com", "PASSWORD");
client.Send(message);

I have this error:

System.Net.Mail.SmtpException : 'Failure sending mail.'

ExtendedSocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or an established connection failed because the connected host has failed to respond.

Some ideas what I'm doing wrong?

Answer 1

When using SmtpClient, if one specifies the incorrect value for SMTP server name (ie: SmtpClient.Host), one receives the following error message:

System.Net.Mail.SmtpException: 'Failure sending mail.'

WebException: Unable to connect to the remote server

SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

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According to POP, IMAP, and SMTP settings:

SMTP Settings

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Also, ensure that you call Dispose for anything that has a Dispose method. The easiest way to do this, is with a using statement (or using declaration).

Try the following:

private void SendEmailOutlook(string toAddress, string fromAddress, string subject, string messageText, bool isHtmlMessage, string username, string password)
{
    MailAddress from = new MailAddress(fromAddress);

    using (SmtpClient client = new SmtpClient("smtp.office365.com", 587) { DeliveryMethod = SmtpDeliveryMethod.Network, EnableSsl = true, UseDefaultCredentials = false })
    {
        client.Credentials = new System.Net.NetworkCredential(username, password);

        MailAddress to = new MailAddress(toAddress);

        using (MailMessage message = new MailMessage(from, to) { IsBodyHtml = isHtmlMessage })
        {
            message.Subject = subject;
            message.Body = messageText;

            client.Send(message);
        }
    }
}