如何使用C＃asp.net应用程序发送短信

问题描述

发送短信时会产生以下错误-----------

错误：SMTP服务器需要安全连接或客户端未经过身份验证。服务器响应为：5.5.1需要身份验证。了解更多信息

 使用系统; 
 使用 System.Data; 
 使用 System.Configuration; 
 使用 System.Web; 
 使用 System.Web.Security; 
 使用 System.Web.UI; 
 使用 System.Web.UI.WebControls; 
 使用 System.Web.UI.WebControls.WebParts; 
 使用 System.Web.UI.HtmlControls; 
 使用 System.Net; 
 使用 System.Net.Mail; 
 
 ------------------------------------- 
 
  string  Subject =  这是测试邮件使用smtp设置，
 Body = txtMessage.Text.Trim（），
 ToEmail = txtToEmail.Text.Trim（）; 
 
  string  SMTPUser =   [email protected]，SMTPPassword =   96511993122222; 
 
  //  现在实例化MailMessage的新实例 
 MailMessage mail =  new  MailMessage（）; 
 
  //  设置邮件的发件人地址 
 mail.From =  new  System.Net.Mail.MailAddress（SMTPUser，  [email protected]）; 
 
  //  设置邮件的接收地址 
 mail.To.Add（ToEmail）; 
 
  //  设置邮件主题 
 mail .Subject =主题; 
 
  //  设置邮件正文 
 mail .Body =身体; 
 
  //  即使你没有发送HTML消息也要保持原样 
 mail.IsBodyHtml =  true ; 
 
  //  将邮件的优先级设置为正常 
 mail.Priority = System.Net.Mail.MailPriority.Normal; 
 
  //  实例化SmtpClient的新实例 
 SmtpClient smtp =  new  SmtpClient（）; 
 
  //  如果您使用的是smtp服务器，请将主机更改为smtp。 yourdomain.com 
 smtp.Host =   smtp.gmail.com; 
 
  //  为您的主机输入您的端口 
 smtp。端口=  587 ;  //  或者您也可以使用＃587端口 
 
  //  提供smtp凭据以对您的帐户进行身份验证 
 smtp.Credentials =  new  System.Net.NetworkCredential（SMTPUser，SMTPPassword）; 
 
  //  如果您使用SSL / TLS使用安全身份验证，则trueelse false 
 smtp.EnableSsl =  true ; 
 smtp.UseDefaultCredentials =  false ; 
 smtp.Send（mail）; 
 
 lblMsg.Text =  成功：邮件发送成功！; 
 lblMsg.ForeColor = System.Drawing.Color.Green; 

解决方案

following error is generate while sending sms-----------
Error: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net;
using System.Net.Mail;

-------------------------------------

            string Subject = "This is test mail using smtp settings",
            Body = txtMessage.Text.Trim(),
            ToEmail = txtToEmail.Text.Trim();

            string SMTPUser = "[email protected]", SMTPPassword = "96511993122222";

            //Now instantiate a new instance of MailMessage
            MailMessage mail = new MailMessage();

            //set the sender address of the mail message
            mail.From = new System.Net.Mail.MailAddress(SMTPUser, "[email protected]");

            //set the recepient addresses of the mail message
            mail.To.Add(ToEmail);

            //set the subject of the mail message
            mail.Subject = Subject;

            //set the body of the mail message
            mail.Body = Body;

            //leave as it is even if you are not sending HTML message
            mail.IsBodyHtml = true;

            //set the priority of the mail message to normal
            mail.Priority = System.Net.Mail.MailPriority.Normal;

            //instantiate a new instance of SmtpClient
            SmtpClient smtp = new SmtpClient();

            //if you are using your smtp server, then change your host like "smtp.yourdomain.com"
            smtp.Host = "smtp.gmail.com";

            //chnage your port for your host
            smtp.Port =587; //or you can also use port# 587

            //provide smtp credentials to authenticate to your account
            smtp.Credentials = new System.Net.NetworkCredential(SMTPUser, SMTPPassword);

            //if you are using secure authentication using SSL/TLS then "true" else "false"
            smtp.EnableSsl = true;
            smtp.UseDefaultCredentials = false;
            smtp.Send(mail);

            lblMsg.Text = "Success: Mail sent successfully!";
            lblMsg.ForeColor = System.Drawing.Color.Green;

解决方案

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