public static bool Send(MailMessage message)
{
IPHostEntry IPhst = Dns.GetHostEntry(SmtpServer);
IPEndPoint endPt = new IPEndPoint(IPhst.AddressList[0], SmtpPort);
Socket s = new Socket(endPt.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
Console.WriteLine("connecting..........");
s.Connect(endPt);
Console.WriteLine("connected........");
string msg = "";
msg = msg + message.From + "\n";
msg = msg + message.To + "\n";
msg = msg + message.Subject + "\n";
int attch_count = 0;
if (message.Attachments.Count > 0)
{
attch_count = message.Attachments.Count;
}
msg = msg + attch_count + "\n";
if (attch_count > 0)
{
foreach (object o in message.Attachments)
{
MailAttachment a = o as MailAttachment;
//int pos = a.Filename.LastIndexOf('\\');
char[] delim = new char[1];
delim[0] = '\\';
string[] nameParts = a.Filename.Split(delim);
//nt count = a.Filename.Length - (pos+1);
//msg = msg + a.Filename.Substring(pos+1, count) + "\n";
string filename = nameParts[nameParts.Length - 1];
filename = Path.GetFileName(a.Filename);
msg = msg + filename + "\n";
}
}
msg = msg + message.Body;
Senddata(s, msg, false);
if (Check_Response(s, SMTPResponse.MSGLEN_SUCCESS))
{
//MessageBox.Show("length acked");
}
if (message.Attachments.Count > 0)
{
foreach (object o in message.Attachments)
{
MailAttachment a = o as MailAttachment;
byte[] binaryData;
if (a != null)
{
FileInfo f = new FileInfo(a.Filename);
FileStream fs = f.OpenRead();
int chunksize = 600000;
for (int j = 0; j < fs.Length; j = j + chunksize)
{
int count = chunksize;
if ((j + count) > fs.Length)
{
count = (int)(fs.Length - (long)j);
}
int bytesRead = 0;
binaryData = null;
binaryData = new Byte[count];
fs.Seek((long)j, SeekOrigin.Begin);
while (bytesRead < count)
{
int bRead = fs.Read(binaryData, bytesRead, count - bytesRead);
bytesRead = bytesRead + bRead;
}
string base64String = System.Convert.ToBase64String(binaryData, 0, binaryData.Length);
SendMsgPart(s, base64String);
}
SendMsgPart(s, "__done__");
fs.Close();
}
}
}
return(true);
}
private void cmdSend_Click(object sender, EventArgs e)
{
SMTP.SmtpDirect.SmtpServer= "10.108.7.138";
SMTP.SmtpDirect.SmtpServer = txtSmtp.Text;
SMTP.SmtpDirect.SmtpPort = Int32.Parse(txtPort.Text);
MailMessage message =new MailMessage();
message.Body = txtBody.Text;
message.From = txtFrom.Text;
message.To = txtTo.Text;
message.Subject = txtSubject.Text;
if (txtAttachment.Text != "")
{
MailAttachment attachment = new MailAttachment(txtAttachment.Text);
message.Attachments.Add(attachment);
}
if(SMTP.SmtpDirect.Send(message))
{
MessageBox.Show("Sent OK");
}
else
{
MessageBox.Show("Something BAD Happened!");
}
txtTo.Text = "";
txtFrom.Text = "";
txtSubject.Text = "";
txtAttachment.Text = "";
txtSmtp.Text = "";
txtPort.Text = "";
txtBody.Text = "";
}
public static bool Send(MailMessage message)
{
IPHostEntry IPhst = Dns.Resolve(SmtpServer);
IPEndPoint endPt = new IPEndPoint(IPhst.AddressList[0], 25);
Socket s = new Socket(endPt.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
s.Connect(endPt);
if (!Check_Response(s, SMTPResponse.CONNECT_SUCCESS))
{
s.Close();
return(false);
}
Senddata(s, string.Format("HELO {0}\r\n", Dns.GetHostName()));
if (!Check_Response(s, SMTPResponse.GENERIC_SUCCESS))
{
s.Close();
return(false);
}
Senddata(s, string.Format("MAIL From: {0}\r\n", message.From));
if (!Check_Response(s, SMTPResponse.GENERIC_SUCCESS))
{
s.Close();
return(false);
}
string _To = message.To;
string[] Tos = _To.Split(new char[] { ';' });
foreach (string To in Tos)
{
Senddata(s, string.Format("RCPT TO: {0}\r\n", To));
if (!Check_Response(s, SMTPResponse.GENERIC_SUCCESS))
{
s.Close();
return(false);
}
}
if (message.Cc != null)
{
Tos = message.Cc.Split(new char[] { ';' });
foreach (string To in Tos)
{
Senddata(s, string.Format("RCPT TO: {0}\r\n", To));
if (!Check_Response(s, SMTPResponse.GENERIC_SUCCESS))
{
s.Close();
return(false);
}
}
}
StringBuilder Header = new StringBuilder();
Header.Append("From: " + message.From + "\r\n");
Tos = message.To.Split(new char[] { ';' });
Header.Append("To: ");
for (int i = 0; i < Tos.Length; i++)
{
Header.Append(i > 0 ? "," : "");
Header.Append(Tos[i]);
}
Header.Append("\r\n");
if (message.Cc != null)
{
Tos = message.Cc.Split(new char[] { ';' });
Header.Append("Cc: ");
for (int i = 0; i < Tos.Length; i++)
{
Header.Append(i > 0 ? "," : "");
Header.Append(Tos[i]);
}
Header.Append("\r\n");
}
Header.Append("Date: ");
Header.Append(DateTime.Now.ToString("ddd, d MMM yyyy H:m:s z"));
Header.Append("\r\n");
Header.Append("Subject: " + message.Subject + "\r\n");
Header.Append("X-Mailer: SMTPDirect v1\r\n");
string importance = null;
if (message.Priority == MailPriority.High)
{
importance = "high";
}
else if (message.Priority == MailPriority.Low)
{
importance = "low";
}
if (importance != null)
{
Header.Append("Importance: " + importance + "\r\n");
}
string MsgBody = message.Body;
if (!MsgBody.EndsWith("\r\n"))
{
MsgBody += "\r\n";
}
if (message.Attachments.Count > 0 || message.BodyFormat == MailFormat.Html)
{
Header.Append("MIME-Version: 1.0\r\n");
Header.Append("Content-Type: multipart/mixed; boundary=unique-boundary-1\r\n");
Header.Append("\r\n");
Header.Append("This is a multi-part message in MIME format.\r\n");
StringBuilder sb = new StringBuilder();
sb.Append("--unique-boundary-1\r\n");
string type = message.BodyFormat == MailFormat.Text ? "plain" : "html";
sb.Append(string.Format("Content-Type: text/{0}\r\n", type));
sb.Append("Content-Transfer-Encoding: 7Bit\r\n");
sb.Append("\r\n");
sb.Append(MsgBody + "\r\n");
sb.Append("\r\n");
foreach (object o in message.Attachments)
{
MailAttachment a = o as MailAttachment;
byte[] binaryData;
if (a != null)
{
FileInfo f = new FileInfo(a.Filename);
sb.Append("--unique-boundary-1\r\n");
sb.Append("Content-Type: application/octet-stream; file=" + f.Name + "\r\n");
sb.Append("Content-Transfer-Encoding: base64\r\n");
sb.Append("Content-Disposition: attachment; filename=" + f.Name + "\r\n");
sb.Append("\r\n");
FileStream fs = f.OpenRead();
binaryData = new Byte[fs.Length];
long bytesRead = fs.Read(binaryData, 0, (int)fs.Length);
fs.Close();
string base64String = Convert.ToBase64String(binaryData, 0, binaryData.Length);
for (int i = 0; i < base64String.Length;)
{
int nextchunk = 100;
if (base64String.Length - (i + nextchunk) < 0)
{
nextchunk = base64String.Length - i;
}
sb.Append(base64String.Substring(i, nextchunk));
sb.Append("\r\n");
i += nextchunk;
}
sb.Append("\r\n");
}
}
MsgBody = sb.ToString();
}
Senddata(s, ("DATA\r\n"));
if (!Check_Response(s, SMTPResponse.DATA_SUCCESS))
{
s.Close();
return(false);
}
Header.Append("\r\n");
Header.Append(MsgBody);
Header.Append(".\r\n");
Header.Append("\r\n");
Header.Append("\r\n");
Senddata(s, Header.ToString());
if (!Check_Response(s, SMTPResponse.GENERIC_SUCCESS))
{
s.Close();
return(false);
}
Senddata(s, "QUIT\r\n");
Check_Response(s, SMTPResponse.QUIT_SUCCESS);
s.Close();
return(true);
}
