C#使用邮箱权限码发送邮件

C#使用权限码发送邮件

/// <summary>
/// 邮件发送的主要方法
/// </summary>
/// <param name="tomail">收件人地址</param>
/// <param name="title">邮件标题</param>
/// <param name="body">邮件主体</param>
/// <returns></returns>
static string SendingMail(string tomail, string title, string body)
{
    string returnwords = "";
    // William.Kang [ outlook ]
    string smtpService = "smtp.office365.com";
    // William.Kang [ 网易 ]
    //string smtpService = "smtp.163.com";

    //邮箱地址
    string sendEmail = "【发件邮箱】";
    string sendpwd = "【授权码】";


    //确定smtp服务器地址 实例化一个Smtp客户端
    SmtpClient smtpclient = new SmtpClient();
    smtpclient.Host = smtpService;
    // William.Kang [ smtp端口 ]
    smtpclient.Port = 587; 

    //确定发件地址与收件地址
    MailAddress sendAddress = new MailAddress(sendEmail);
    MailAddress receiveAddress = new MailAddress(tomail);

    //构造一个Email的Message对象 内容信息
    MailMessage mailMessage = new MailMessage(sendAddress, receiveAddress);
    mailMessage.Subject = title;
    mailMessage.SubjectEncoding = System.Text.Encoding.UTF8;
    mailMessage.Body = body;
    mailMessage.BodyEncoding = System.Text.Encoding.UTF8;

    //邮件发送方式  通过网络发送到smtp服务器
    smtpclient.DeliveryMethod = SmtpDeliveryMethod.Network;

    //如果服务器支持安全连接，则将安全连接设为true
    smtpclient.EnableSsl = true;
    try
    {
        //是否使用默认凭据，若为false，则使用自定义的证书，就是下面的networkCredential实例对象
        smtpclient.UseDefaultCredentials = false;

        //指定邮箱账号和密码,需要注意的是，这个密码是你在QQ邮箱设置里开启服务的时候给你的那个授权码
        NetworkCredential networkCredential = new NetworkCredential(sendEmail, sendpwd);
        smtpclient.Credentials = networkCredential;

        //发送邮件
        smtpclient.Send(mailMessage);
        returnwords = "发送邮件成功";

    }
    catch (SmtpException ex)
    {
        returnwords = ("发送邮件出错");
    }
    return returnwords;
}