private void button1_Click(object sender, EventArgs e) { //创建一个邮件对像 MailMessage mailObject = new MailMessage(); //设置发件人 mailObject.From = new MailAddress("lqwvje@163.com"); //设置收件人 mailObject.To.Add(new MailAddress("78630559@qq.com")); //设置邮件主题 mailObject.SubjectEncoding = Encoding.UTF8; mailObject.Subject = "lqwvje测试邮件"; mailObject.BodyEncoding = Encoding.UTF8;//编码 mailObject.Body = "我是罗分明,这是一个测试邮件"; //创建一个发送邮件的对像 服务地址和端口 SmtpClient smtpClient = new SmtpClient("smtp.163.com", 25); //帐号密码一定要正确 smtpClient.Credentials = new NetworkCredential("lqwvje", "123456"); smtpClient.Send(mailObject); MessageBox.Show("ok"); }