用Socket发邮件的代码(可以群发)_强强邮箱群发代码-优快云博客

本文链接：https://blog.youkuaiyun.com/zhangkunls/article/details/1004186

本文介绍了一个基于ASP.NET的简单群发邮件应用程序。通过该程序可以设置SMTP服务器、用户名及密码等信息，并支持向多个收件人发送带有特定主题和内容的电子邮件。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

qunFa.aspx文件的代码：

<%@ Page language="c#" Codebehind="qunFa.aspx.cs" AutoEventWireup="false" Inherits="liuwei.hanmail.qunFa" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

<HEAD>

<title>qunFa</title>

</HEAD>

<asp:ListBox id="ListBoxMsg" style="Z-INDEX: 118; LEFT: 136px; POSITION: absolute; TOP: 344px"

runat="server" Width="440px" Height="184px"></asp:ListBox>

<asp:Label id="Label11" style="Z-INDEX: 108; LEFT: 120px; POSITION: absolute; TOP: 320px" runat="server">信息查看</asp:Label>

<asp:Label id="Label10" style="Z-INDEX: 117; LEFT: 112px; POSITION: absolute; TOP: 16px" runat="server">SMTP服务器地址</asp:Label>

<asp:Label id="Label9" style="Z-INDEX: 100; LEFT: 128px; POSITION: absolute; TOP: 48px" runat="server">用户名</asp:Label>

<asp:TextBox id="TextBoxSrv" style="Z-INDEX: 101; LEFT: 264px; POSITION: absolute; TOP: 24px"

runat="server" Width="240px"></asp:TextBox>

<asp:Label id="Label8" style="Z-INDEX: 102; LEFT: 360px; POSITION: absolute; TOP: 48px" runat="server">口令</asp:Label>

<asp:TextBox id="TextBoxUser" style="Z-INDEX: 103; LEFT: 192px; POSITION: absolute; TOP: 48px"

runat="server" Width="152px"></asp:TextBox>

<asp:TextBox id="TextBoxPwd" style="Z-INDEX: 104; LEFT: 416px; POSITION: absolute; TOP: 48px"

runat="server" Width="168px" TextMode="Password"></asp:TextBox>

<asp:Label id="Label4" style="Z-INDEX: 105; LEFT: 128px; POSITION: absolute; TOP: 80px" runat="server">发信人</asp:Label>

<asp:Label id="Label5" style="Z-INDEX: 106; LEFT: 360px; POSITION: absolute; TOP: 80px" runat="server">收信人</asp:Label>

<asp:TextBox id="TextBoxSend" style="Z-INDEX: 107; LEFT: 192px; POSITION: absolute; TOP: 80px"

runat="server"></asp:TextBox>

<asp:TextBox id="TextBoxRev" style="Z-INDEX: 109; LEFT: 416px; POSITION: absolute; TOP: 80px"

runat="server" Width="168px"></asp:TextBox>

<asp:Label id="Label6" style="Z-INDEX: 110; LEFT: 128px; POSITION: absolute; TOP: 112px" runat="server">主题</asp:Label>

<asp:TextBox id="TextBoxSubject" style="Z-INDEX: 112; LEFT: 192px; POSITION: absolute; TOP: 104px"

runat="server" Width="392px"></asp:TextBox>

<asp:TextBox id="TextBoxMailText" style="Z-INDEX: 113; LEFT: 144px; POSITION: absolute; TOP: 160px"

runat="server" Width="440px" TextMode="MultiLine" Height="120px"></asp:TextBox>

<asp:Label id="Label7" style="Z-INDEX: 114; LEFT: 128px; POSITION: absolute; TOP: 136px" runat="server">邮件内容</asp:Label>

<asp:Button id="ButtonSend" style="Z-INDEX: 115; LEFT: 464px; POSITION: absolute; TOP: 296px"

runat="server" Text="发送"></asp:Button>

<asp:Label id="LabelErr" style="Z-INDEX: 116; LEFT: 696px; POSITION: absolute; TOP: 136px"

runat="server"></asp:Label></FORM>

</body>

</HTML>

qunFa.aspx.cs的代码：

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Web;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

using System.IO;

using System.Net;

using System.Net.Sockets;

namespace Sendmail

{

/// <summary>

/// qunFa 的摘要说明。

/// </summary>

public class qunFa : System.Web.UI.Page

{

protected System.Web.UI.WebControls.Label LabelErr;

protected System.Web.UI.WebControls.Button ButtonSend;

protected System.Web.UI.WebControls.Label Label7;

protected System.Web.UI.WebControls.TextBox TextBoxMailText;

protected System.Web.UI.WebControls.TextBox TextBoxSubject;

protected System.Web.UI.WebControls.Label Label6;

protected System.Web.UI.WebControls.TextBox TextBoxRev;

protected System.Web.UI.WebControls.TextBox TextBoxSend;

protected System.Web.UI.WebControls.Label Label5;

protected System.Web.UI.WebControls.Label Label4;

protected System.Web.UI.WebControls.TextBox TextBoxPwd;

protected System.Web.UI.WebControls.TextBox TextBoxUser;

protected System.Web.UI.WebControls.Label Label8;

protected System.Web.UI.WebControls.TextBox TextBoxSrv;

protected System.Web.UI.WebControls.Label Label9;

protected System.Web.UI.WebControls.Label Label11;

protected System.Web.UI.WebControls.ListBox ListBoxMsg;

protected System.Web.UI.WebControls.Label Label10;

TcpClient smtpSrv;

NetworkStream netStrm;

string CRLF=" ";

private void Page_Load(object sender, System.EventArgs e)

{

}

Web 窗体设计器生成的代码

private void ButtonSend_Click(object sender, System.EventArgs e)

{

this.ListBoxMsg.Items.Clear();

string[] userList=this.TextBoxRev.Text.Split(',');

for(int i=0;i<userList.Length;i++)

Qun(userList[i]);

}

public void Qun(string userList)

{

try

{

string data;

smtpSrv=new TcpClient(this.TextBoxSrv.Text,25);

netStrm=smtpSrv.GetStream();

StreamReader rdStrm=new StreamReader(smtpSrv.GetStream());

this.WriteStream("EHLO Local");

this.ListBoxMsg.Items.Add(rdStrm.ReadLine());

this.WriteStream("AUTH LOGIN");

this.ListBoxMsg.Items.Add(rdStrm.ReadLine());

data=this.TextBoxUser.Text;

data=AuthStream(data);

this.WriteStream(data);

this.ListBoxMsg.Items.Add(rdStrm.ReadLine());

data=this.TextBoxPwd.Text;

data=AuthStream(data);

this.WriteStream(data);

this.ListBoxMsg.Items.Add(rdStrm.ReadLine());

data="MAIL FROM:<"+this.TextBoxSend.Text+">";

this.WriteStream(data);

this.ListBoxMsg.Items.Add(rdStrm.ReadLine());

data="RCPT TO:<"+userList+">";

this.WriteStream(data);

this.ListBoxMsg.Items.Add(rdStrm.ReadLine());

this.WriteStream("DATA");

this.ListBoxMsg.Items.Add(rdStrm.ReadLine());

data="Date:"+DateTime.Now;

this.WriteStream(data);

data="From:"+this.TextBoxSend.Text;

this.WriteStream(data);

data="TO:"+userList;

this.WriteStream(data);

data="SUBJECT:"+this.TextBoxSubject.Text;

this.WriteStream(data);

data="Reply-TO:"+this.TextBoxSend.Text;

this.WriteStream(data);

this.WriteStream("");

this.WriteStream(this.TextBoxMailText.Text);

this.WriteStream(".");

this.ListBoxMsg.Items.Add(rdStrm.ReadLine());

this.WriteStream("QUIT");

this.ListBoxMsg.Items.Add(rdStrm.ReadLine());

netStrm.Close();

rdStrm.Close();

this.LabelErr.Text="发送成功!";

}

catch(Exception ex)

{

this.LabelErr.Text=ex.ToString();

}

private void WriteStream(string strCmd)

{

strCmd+=CRLF;

byte[] bw=System.Text.Encoding.Default.GetBytes(strCmd);

netStrm.Write(bw,0,bw.Length);

}

private string AuthStream(string strCmd)

{

try

{

byte[] by=System.Text.Encoding.Default.GetBytes(strCmd);

strCmd=Convert.ToBase64String(by);

}

catch(Exception err)

{

return err.ToString();

}

return strCmd;

}

注：多个收件人之间用逗号隔开