smtp

[大户翁]

给一发邮件的例子

[大户翁]

private string qq(string str)
{
string username=null;
Byte[] orig=new Byte[1024];
Byte[] aim=new Byte[1024];
int x=str.Length;
string orig1=str;
if (x%3==1)
{
orig1=str+"\0\0";
}
if (x%3==2)
{
orig1=str+"\0";
}
int y=0;
int z=orig1.Length;
while(z!=0)
{
string orig2=orig1.Substring(y * 3,3);

y++;
z=z-3;

orig=System.Text.Encoding.ASCII.GetBytes(orig2);
ToBase64Transform aa=new ToBase64Transform();
aa.TransformBlock(orig,0,orig.Length,aim,0);
string ss=System.Text.Encoding.ASCII.GetString(aim,0,aim.Length);
ss=ss.Substring(0,4);
username=username+ss;

}
return username;
}

private void button5_Click(object sender, System.EventArgs e)

{

// 将鼠标形状改为漏斗状

Cursor cr = Cursor.Current;

Cursor.Current = Cursors.Cross;

//定义变量

string Data;

byte[] szData;

string CRLF = "\r\n";

//创建与服务器25端口的连接

TcpClient SmtpServ = new TcpClient("smtp.263.net",25);

TcpClient pop3Serv = new TcpClient("263.net",110);

lstlog.Items.Clear();

//显示服务器初始信息

NetworkStream NetStrm = SmtpServ.GetStream();

StreamReader RdStrm1= new StreamReader(pop3Serv.GetStream());
StreamReader RdStrm= new StreamReader(SmtpServ.GetStream());

lstlog.Items.Add(RdStrm1.ReadLine());
lstlog.Items.Add(RdStrm.ReadLine());
// 身份验征
Data = "AUTH LOGIN " ;
szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
NetStrm.Write(szData,0,szData.Length);
lstlog.Items.Add("1 "+RdStrm.ReadLine());
Data = qq(textBox1.Text) ;
szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
NetStrm.Write(szData,0,szData.Length);
lstlog.Items.Add("2 "+RdStrm.ReadLine());
Data = qq(textBox2.Text) ;
szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
NetStrm.Write(szData,0,szData.Length);
lstlog.Items.Add("3 "+RdStrm.ReadLine());
// //标志发件人

Data = "HELO server " ;

szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());

NetStrm.Write(szData,0,szData.Length);

lstlog.Items.Add("HELO"+RdStrm.ReadLine());

//标志发件人

Data = "MAIL FROM: " + "<" + "[e-mail]" + ">" + CRLF;

szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());

NetStrm.Write(szData,0,szData.Length);

lstlog.Items.Add(RdStrm.ReadLine());

// 标志收件人

Data = "RCPT TO: " + "<" + "[e-mail]" + ">" + CRLF;

szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());

NetStrm.Write(szData,0,szData.Length);

lstlog.Items.Add(RdStrm.ReadLine());


//准备发送内容

Data = "DATA " ;

szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());

NetStrm.Write(szData,0,szData.Length);

lstlog.Items.Add(RdStrm.ReadLine());

//发送主题

Data = "SUBJECT: "+"MMYY" + CRLF ;

//发送内容

Data = Data+ "悄虚" + CRLF ;

//结束发送

Data = Data+ "." + CRLF;

szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());

NetStrm.Write(szData,0,szData.Length);

lstlog.Items.Add(RdStrm.ReadLine());

//退出

Data = "QUIT " + CRLF;

szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());

NetStrm.Write(szData,0,szData.Length);

lstlog.Items.Add(RdStrm.ReadLine());

//关闭连接

NetStrm.Close();

RdStrm.Close();

lstlog.Items.Add("连接关闭");

lstlog.Items.Add("发送成功");



//将鼠标恢复箭头状

Cursor.Current = cr;

}

[大户翁]

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[TheAres]

参考微软舍区的一篇文章,介绍了三种不同方法.

在.NET中使用SMTP发送邮件
http://www.microsoft.com/china/community/article.asp?oBODY=TechZone/TechArticle/TechDoc/sendmail&oXSLT=TechZone/TechArticle/TechContent

[lihonggen0]

http://www.csdn.net/develop/article/17/17189.shtm


在.NET中使用SMTP发送邮件
http://www.microsoft.com/china/community/article.asp?oBODY=TechZone/TechArticle/TechDoc/sendmail&oXSLT=TechZone/TechArticle/TechContent


C# - MailSender 邮件发送组件源代码 (支持ESMTP, 附件)
http://www.csdn.net/develop/Read_Article.asp?Id=18223