private void StartSession()
{
Debug.WriteLine("Connection accepted!");
_sslStream = CreateSslStream(_networkStream);
SendFormat("220 {0} SMTP server ready.", "localhost");
string response = ReadResponse();
if (!response.StartsWith("HELO") && !response.StartsWith("EHLO"))
{
Send("500 UNKNOWN COMMAND");
_networkStream.Close();
return;
}
string remoteServer = response.Replace("HELO", string.Empty).Replace("EHLO", string.Empty).Trim();
Send("250-localhost");
Send("250 AUTH LOGIN PLAIN CRAM-MD5");
response = ReadResponse();
string username = null;
if (response.ToUpper() == "AUTH LOGIN")
{
Send("334 VXNlcm5hbWU6");
var encodedUsername = ReadResponse();
username = GetUsername(encodedUsername);
Send("334 UGFzc3dvcmQ6");
var passwordResponse = ReadResponse();
var password = GetUsername(passwordResponse);
SessionMailBox = VerifyUser(username, password);
if (SessionMailBox != null)
{
Send("235 OK, GO AHEAD");
}
else
{
Send("500 Bad Username or Password");
_networkStream.Close();
return;
}
}
MailMessage emailMessage = new MailMessage()
{
Sent = DateTime.UtcNow
};
do
{
var senderMessage = ReadResponse();
if (!senderMessage.StartsWith("MAIL FROM:"))
{
emailMessage.From = response;
Send("500 UNKNOWN COMMAND");
_networkStream.Close();
return;
}
else
{
var recipient = senderMessage.Replace("MAIL FROM:", string.Empty).Trim();
SendFormat("250 Go ahead with message for {0}", recipient);
}
var recipientMessage = ReadResponse();
do
{
if (!recipientMessage.StartsWith("RCPT TO:"))
{
emailMessage.To = response;
Send("500 UNKNOWN COMMAND");
_networkStream.Close();
return;
}
else
{
var sender = recipientMessage.Replace("MAIL FROM:", string.Empty).Trim();
SendFormat("250 {0} I like that guy too!", sender);
}
recipientMessage = ReadResponse();
}while (recipientMessage.Trim() != "DATA");
Send("354 Enter message. When finished, enter \".\" on a line by itself");
int counter = 0;
StringBuilder message = new StringBuilder();
while ((response = ReadResponse().Trim()) != ".")
{
message.AppendLine(response);
counter++;
if (counter == 1000000)
{
_networkStream.Close();
return;
}
}
Console.WriteLine("Received message:");
Send("250 OK");
response = ReadResponse();
var messageBody = message.ToString();
string uri = MailStorage.Save(username, messageBody);
using (var stream = MailStorage.GetStream(messageBody))
{
var parser = new MimeParser(stream);
var parsedMessage = parser.ParseMessage();
HeaderList headers = parsedMessage.Headers;
StringBuilder headerBuilder = new StringBuilder();
foreach (var header in headers)
{
headerBuilder.AppendLine(header.ToString());
}
var headerText = headerBuilder.ToString();
var messageText = parsedMessage.GetTextBody(MimeKit.Text.TextFormat.Text);
if (messageText != null)
{
messageText = messageText.Substring(0, 200);
}
MailboxMessage mmbm = new MailboxMessage
{
MailboxId = SessionMailBox.MailBoxId,
MessageId = parsedMessage.MessageId,
Body = messageText,
RawHeader = headerText,
MessageUrl = uri,
Recieved = DateTime.UtcNow,
IsRead = false
};
SqlServerMailboxRepositry.AddMailMessage(SessionMailBox, mmbm);
}
if (response.ToUpper() == "RSET")
{
Send("250 OK");
}
}while (response.ToUpper() == "RSET");
{
_networkStream.Close();
}
}
private void ReadMailMessage()
{
var data = String.Empty;
MailMessage emailMessage = new MailMessage()
{
Sent = DateTime.UtcNow
};
var senderMessage = ReadResponse();
if (!senderMessage.StartsWith("MAIL FROM:"))
{
Send("500 UNKNOWN COMMAND");
_stream.Close();
return;
}
else
{
var recipient = senderMessage.Replace("MAIL FROM:", string.Empty).Trim();
SendFormat("250 Go ahead with message for {0}", recipient);
}
var recipientMessage = ReadResponse();
if (!recipientMessage.StartsWith("RCPT TO:"))
{
Send("500 UNKNOWN COMMAND");
_stream.Close();
return;
}
else
{
var sender = recipientMessage.Replace("MAIL FROM:", string.Empty).Trim();
SendFormat("250 {0} I like that guy too!", sender);
}
data = ReadResponse();
if (data.Trim() != "DATA")
{
Send("500 UNKNOWN COMMAND");
_stream.Close();
return;
}
Send("354 Enter message. When finished, enter \".\" on a line by itself");
int counter = 0;
StringBuilder message = new StringBuilder();
string splitData;
while ((splitData = ReadResponse().Trim()) != ".")
{
message.AppendLine(splitData);
counter++;
}
Console.WriteLine("Received message:");
Send("250 OK");
var messageBody = message.ToString();
string key = MailStorage.Save(RemoteUser, messageBody);
using (var stream = MailStorage.GetStream(messageBody))
{
var parser = new MimeParser(stream);
HeaderList headers = parser.ParseHeaders();
StringBuilder headerBuilder = new StringBuilder();
foreach (var header in headers)
{
headerBuilder.AppendLine(header.ToString());
}
var headerText = headerBuilder.ToString();
MailStorage.QueueMessage(key, RemoteUser, headerText);
}
}
