minaalamshahi
دوشنبه 07 مرداد 1392, 18:08 عصر
protected void Button1_Click(object sender, EventArgs e)
{
TcpClient tClient = new TcpClient("gmail-smtp-in.l.google.com", 25);
string CRLF = "\r\n";
byte[] dataBuffer;
string ResponseString;
NetworkStream netStream = tClient.GetStream();
StreamReader reader = new StreamReader(netStream);
ResponseString = reader.ReadLine();
/* Perform HELLO to SMTP Server and get Response */
dataBuffer = BytesFromString("HELO " + CRLF);
netStream.Write(dataBuffer, 0, dataBuffer.Length);
ResponseString = reader.ReadLine();
dataBuffer = BytesFromString("MAIL FROM:<hosseinhagh66@gmail.com>" + CRLF);
netStream.Write(dataBuffer, 0, dataBuffer.Length);
ResponseString = reader.ReadLine();
/* Read Response of the RCPT TO Message to know from google if it exist or not */
dataBuffer = BytesFromString("RCPT TO:<" + TextBox1.Text.Trim() + ">" + CRLF);
netStream.Write(dataBuffer, 0, dataBuffer.Length);
ResponseString = reader.ReadLine();
if (GetResponseCode(ResponseString) == 550)
{
Response.Write("Mai Address Does not Exist !<br/><br/>");
Response.Write("<B><font color='red'>Original Error from Smtp Server :</font></b>" + ResponseString);
}
/* QUITE CONNECTION */
dataBuffer = BytesFromString("QUITE" + CRLF);
netStream.Write(dataBuffer, 0, dataBuffer.Length);
tClient.Close();
}
private byte[] BytesFromString(string str)
{
return Encoding.ASCII.GetBytes(str);
}
private int GetResponseCode(string ResponseString)
{
return int.Parse(ResponseString.Substring(0, 3));
}
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
اگه ایمیل نادرست بود این خطا رو میده
http://uploadtak.com/images/5669_testemailIncorrect.jpg
من از این روش برای چک کردن ایمیل استفاده میکنم اگه خواستی یه توضیح بدم
این روش فقط برای gmail جواب میده؟