C＃编程发送邮件

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

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

//标志发件人

Data = "MAIL FROM: " + "<" + txtfrom.Text + ">" + 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: " + "<" + txtto.Text + ">" + 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 " + CRLF;

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: " + txtsub.Text + CRLF ;

//发送内容

Data = Data+ txtmsg.Text + CRLF ;