用C#实现用免费smtp服务器（GMail）发邮件(转)

原文地址：http://www.cnblogs.com/skywind/archive/2007/09/21/901734.html

Method 1

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// using System.Net.Mail;

MailMessage message = new MailMessage();

message.From = new MailAddress("Sender@gmail.com", "Your DisplayName"); // 发件人邮箱地址和显示名称

message.To.Add(new MailAddress("Recipients@gmail.com")); // 收件人地址,可以设置多个



message.Subject = "邮件标题" ;



message.Body = "邮件正文";



message .IsBodyHtml = false; // 设置邮件正文是否为 html 格式的值

message .BodyEncoding = System.Text.Encoding.UTF8;  // 设置邮件正文编码

message .Priority = MailPriority.Normal; // 设置电子邮件的优先级



// 包含附件



string attachPath = "附件地址";



System.Net.Mail.Attachment attachment = new System.Net.Mail.Attachment(attachPath); 



attachment.Name = System.IO.Path.GetFileName(attachPath); // 附件名称

attachment.NameEncoding = System.Text.Encoding.GetEncoding("gb2312"); // 附件名称的编码

attachment.TransferEncoding = System.Net.Mime.TransferEncoding.Base64; // 设置附件的编码

attachment.ContentDisposition.Inline = true;

attachment.ContentDisposition.DispositionType = System.Net.Mime.DispositionTypeNames.Inline;

string cid = attachment.ContentId; // 关键性的地方，这里得到一个id数值



message .Attachments.Add(attachment); // 可以添加多个附件



 



SmtpClient client = new SmtpClient();



client .Host = "smtp.gmail.com"; // 设置 smtp 事务的主机名称或 IP 地址

client .Port = 587; // 端口号



client.Credentials = new System.Net.NetworkCredential("Sender@gmail.com", "mailbox password"); // Your mail address & password

client.EnableSsl = true; // 经过ssl加密,gmail 邮箱必须设置为 ture



try

{

client.Send(message);

Response.Write("邮件发送到" + message.To.ToString() + "<br>");

}

catch (Exception ee)

{

Response.Write(ee.messageage + "<br>" + ee.InnerException.messageage);

} 

Method 2
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// http://weblogs.asp.net/scottgu/archive/2005/12/10/432854.aspx

// using System.Net.Mail;

MailMessage message = new MailMessage();

message.From = new MailAddress("Sender@gmail.com"); 



message.To.Add(new MailAddress("Recipients@gmail.com")); 



message.Subject = "This is my subject"

message.Body = "This is the content"

SmtpClient client = new SmtpClient();

client.EnableSsl = true;  // 经过ssl加密,gmail 邮箱必须设置为 ture 



try

{

client.Send(message);

Response.Write("邮件发送到" + message.To.ToString() + "<br>");

}

catch (Exception ee)

{

Response.Write(ee.Message );

} 
//In web.config
<system.net>

<mailSettings>

<smtp from="displayName<from@gmail.com>">

<network host="smtp.gmail.com" port="587" userName="Sender@gmail.com" password="your pwd" />

<!-- if has 'defaultCredentials="true"' , using Gmail can not send success -->

</smtp>

</mailSettings>

</system.net>