public void TestSendMailDemo()

{

var message = new MimeKit.MimeMessage();

message.From.Add(new MimeKit.MailboxAddress("hotmail", "china-psu@hotmail.com"));

message.To.Add(new MimeKit.MailboxAddress("qq", "283775652@qq.com"));

message.Subject = "This is a Test Mail";

var plain = new MimeKit.TextPart("plain")

{

Text = @"不好意思，我在测试程序，Sorry！"

};

var html = new MimeKit.TextPart("html")

{

Text = @"<p>Hey geffzhang<br>

<p>不好意思，我在测试程序，Sorry！<br>

<p>-- Geffzhang<br>"

};

// create an image attachment for the file located at path

var path = "D:\\雄安.jpg";

var fs = File.OpenRead(path);

var attachment = new MimeKit.MimePart("image", "jpeg")

{

ContentObject = new MimeKit.ContentObject(fs, MimeKit.ContentEncoding.Default),

ContentDisposition = new MimeKit.ContentDisposition(MimeKit.ContentDisposition.Attachment),

ContentTransferEncoding = MimeKit.ContentEncoding.Base64,

FileName = Path.GetFileName(path)

};

var alternative = new MimeKit.Multipart("alternative");

alternative.Add(plain);

alternative.Add(html);

// now create the multipart/mixed container to hold the message text and the

// image attachment

var multipart = new MimeKit.Multipart("mixed");

multipart.Add(alternative);

multipart.Add(attachment);

message.Body = multipart;

using (var client = new MailKit.Net.Smtp.SmtpClient())

{

client.Connect("smtp.live.com", 587, false);

// Note: since we don't have an OAuth2 token, disable

// the XOAUTH2 authentication mechanism.

client.AuthenticationMechanisms.Remove("XOAUTH2");

// Note: only needed if the SMTP server requires authentication

var mailFromAccount = "china-psu@hotmail.com";

var mailPassword = "xxxxxxxxxxxxxxxxxxx";

client.Authenticate(mailFromAccount, mailPassword);

client.Send(message);

client.Disconnect(true);

}

fs.Dispose();

}