C#使用OUTLOOK发送邮件

引用命名空间：using System.Net.Mail;

新建一个SmtpClient 类的实例，让其使用指定的 SMTP 服务器发送电子邮件。

SmtpClient client = new SmtpClient(server);

新建一个MailMessage对象来配置要发送的各种信息，发件箱、收件箱、附件、主题、正文等等

MailMessage message = new MailMessage(); 
message.From = fromAddress; //发件地址
message.To.Add(toAddress);  //收件地址
message.CC.Add(ccAddress);  //抄送地址
message.Attachments.Add(new Attachment("test.txt"));  //附件
message.Body = body;  //邮件正文，string类型
message.BodyEncoding = System.Text.Encoding.UTF8;  //正文编码方式
message.Subject = subject;  //邮件主题
message.SubjectEncoding = System.Text.Encoding.UTF8;  //主题编码方式

而后使用SmtpClient的Send方法发送邮件

client.Send(message);

以下为完整的示例代码：

public static void SendMail(string body)
{
     SmtpClient client = new SmtpClient(server);
     client.UseDefaultCredentials = true;

     MailAddress from = new MailAddress("from@microsoft.com");
     MailAddress to = new MailAddress("to@microsoft.com");
     MailAddress cc = new MailAddress("cc@microsoft.com");

     MailMessage message = new MailMessage();

     message.From = from;
     message.To.Add(to);
     message.CC.Add(cc);
     message.Attachments.Add(new Attachment("test.txt"));
     message.Body = body;
     message.BodyEncoding = System.Text.Encoding.UTF8;
     message.Subject = subject;
     message.SubjectEncoding = System.Text.Encoding.UTF8;
     client.Send(message);
     message.Dispose();
     message = null;
     client.Dispose();
     client = null;
}