C#实现发送邮件

一、163邮箱

//mailAddress 所要发送的邮箱地址，subject 邮件标题，body邮件内容

//发送邮件所用邮箱（163邮箱）

string Email_Send = "xxxxxxx@126.com";

//发送所用邮箱密码

string Email_Password = "授权码";
MailMessage message = new MailMessage();

message.From = new MailAddress(Email_Send, "验证码管理员", System.Text.Encoding.UTF8);

//被发送邮箱

message.To.Add(new MailAddress(mailAddress));

//邮件标题

message.Subject = subject;

message.IsBodyHtml = true;
message.BodyEncoding = System.Text.Encoding.UTF8;

//时间
string validtime = DateTime.Now.ToString();

//邮件内容
message.Body = body;
message.Priority = MailPriority.High;

SmtpClient client = new SmtpClient("smtp.126.com");

//所用邮箱和密码

client.Credentials = new NetworkCredential(Email_Send, Email_Password);
//client.Host = "smtp.163.com";
client.EnableSsl = true; //必须经过ssl加密 
try
{
    client.Send(message);
    MessageBox.Show("发送至邮箱，请注意查收！");
}
catch (Exception ee)
{
    MessageBox.Show(ee.Message);
}

二、Gmail

public void SendMailUseGmail()
{
    System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();
    msg.To.Add("a@a.com");
    msg.To.Add("b@b.com");
    /*
            * msg.To.Add("b@b.com");
            * msg.To.Add("b@b.com");
            * msg.To.Add("b@b.com");可以发送给多人
            */
    msg.CC.Add("c@c.com");
    /*
            * msg.CC.Add("c@c.com");
            * msg.CC.Add("c@c.com");可以抄送给多人
            */
    msg.From = new MailAddress("a@a.com", "AlphaWu", System.Text.Encoding.UTF8);
    /* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/
    msg.Subject = "这是测试邮件";//邮件标题            
    msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码
    msg.Body = "邮件内容";//邮件内容
    msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码
    msg.IsBodyHtml = false;//是否是HTML邮件
    msg.Priority = MailPriority.High;//邮件优先级
    SmtpClient client = new SmtpClient();
    client.Credentials = new System.Net.NetworkCredential("username@gmail.com", "password");
    //上述写你的GMail邮箱和密码
    client.Port = 587;//Gmail使用的端口
    client.Host = "smtp.gmail.com";
    client.EnableSsl = true;//经过ssl加密
    object userState = msg;
    try
    {
        client.SendAsync(msg, userState);
        //简单一点儿可以client.Send(msg);
        MessageBox.Show("发送成功");
    }
    catch (System.Net.Mail.SmtpException ex)
    {
        MessageBox.Show(ex.Message, "发送邮件出错");
    }
}