private SmtpResponseReader SendSenders(Message message)
{
SmtpResponseReader reader = null;
foreach (var from in message.From)
{
var text = string.Format("MAIL FROM:<{0}>", from.Address.FullAddress);
var command = new SmtpCommand(text);
reader = SendAndReceive(command);
if (reader.IsFatalOrErroneous)
{
return(reader);
}
}
return(reader);
}
/// <summary>
/// Cram-MD5 authorization.
/// http://tools.ietf.org/html/rfc2195
/// </summary>
private bool AuthenticateCramMd5(NetworkCredential credentials)
{
var command = new SmtpCommand("AUTH CRAM-MD5");
var response = _client.SendAndReceive(command);
var base64 = response.CurrentLine.Substring(4).TrimEnd();
var challenge = Base64Encoder.Decode(base64, Encoding.UTF8);
var username = credentials.UserName;
var password = credentials.Password;
var hash = CramMd5Hasher.ComputeHash(password, challenge);
var authentication = username + " " + hash;
var reader = _client.SendAndReceive(new SmtpCommand(Base64Encoder.Encode(authentication)));
return(reader.IsOk);
}
private SmtpResponseReader SendData(Message message)
{
SendAndReceive(new SmtpCommand("DATA"));
var mime = message.ToMime();
using (var reader = new StringReader(mime)) {
var chunkSize = UpdateUploadProgressTriggerChunkSize.Bytes;
var trigger = chunkSize;
var current = 0;
var total = mime.Length;
var command = new SmtpCommand(string.Empty);
while (true)
{
var line = reader.ReadLine();
if (line == null)
{
break;
}
command.Text = StuffPeriodIfNecessary(line);
Send(command);
// dont forget the newline characters
current += command.Text.Length + 2;
if (trigger - current < 0)
{
InvokeUploadProgressChanged(current, total);
trigger += chunkSize;
}
if (current >= total)
{
InvokeUploadProgressChanged(total, total);
}
}
SendDataTermination();
}
return(Receive());
}
private SmtpServerCapability Hello()
{
var host = Dns.GetHostName();
var command = new SmtpCommand("EHLO " + host);
Send(command);
// Timeout suggestion
// http://tools.ietf.org/html/rfc5321#section-4.5.3.2.1
var timeout = TimeSpan.FromMinutes(5);
var response = Receive(timeout);
// fallback to HELO if EHLO is not supported
if (response.IsFatalOrErroneous)
{
command = new SmtpCommand("HELO " + host);
Send(command);
response = Receive(timeout);
}
return(StaticResponseParser.ParseCapability(response));
}
/// <summary>
/// Login authorization, same as plain but split into two separate command/responses.
/// http://tools.ietf.org/html/rfc4616
/// </summary>
private bool AuthenticateLogin(NetworkCredential credentials)
{
var command = new SmtpCommand("AUTH LOGIN");
var response = _client.SendAndReceive(command);
if (response.ResponseCode != 334)
{
return(false);
}
var username = Base64Encoder.Encode(credentials.UserName);
var userNameResponse = _client.SendAndReceive(new SmtpCommand(username));
if (userNameResponse.ResponseCode != 334)
{
return(false);
}
var password = Base64Encoder.Encode(credentials.Password);
var passwordResponse = _client.SendAndReceive(new SmtpCommand(password));
return(passwordResponse.ResponseCode == ResponseCodes.AuthenticationSuccessful);
}
private SmtpResponseReader SendRecipients(Message message)
{
SmtpResponseReader reader = null;
var recipients = new List <EmailContact>();
recipients.AddRange(message.Ccs);
recipients.AddRange(message.Bccs);
recipients.AddRange(message.To);
recipients.RemoveDuplicates();
foreach (var recipient in recipients)
{
var text = string.Format("RCPT TO:<{0}>", recipient.Address.FullAddress);
var command = new SmtpCommand(text);
reader = SendAndReceive(command);
if (reader.IsFatalOrErroneous)
{
return(reader);
}
}
return(reader);
}
private SmtpResponseReader SendData(Message message)
{
SendAndReceive(new SmtpCommand("DATA"));
var mime = message.ToMime();
using (var reader = new StringReader(mime)) {
var chunkSize = UpdateUploadProgressTriggerChunkSize.Bytes;
var trigger = chunkSize;
var current = 0;
var total = mime.Length;
var command = new SmtpCommand(string.Empty);
while (true) {
var line = reader.ReadLine();
if (line == null) {
break;
}
command.Text = StuffPeriodIfNecessary(line);
Send(command);
// dont forget the newline characters
current += command.Text.Length + 2;
if (trigger - current < 0) {
InvokeUploadProgressChanged(current, total);
trigger += chunkSize;
}
if (current >= total) {
InvokeUploadProgressChanged(total, total);
}
}
SendDataTermination();
}
return Receive();
}
private SmtpServerCapability Hello()
{
var host = Dns.GetHostName();
var command = new SmtpCommand("EHLO " + host);
Send(command);
// Timeout suggestion
// http://tools.ietf.org/html/rfc5321#section-4.5.3.2.1
var timeout = TimeSpan.FromMinutes(5);
var response = Receive(timeout);
// fallback to HELO if EHLO is not supported
if (response.IsFatalOrErroneous) {
command = new SmtpCommand("HELO " + host);
Send(command);
response = Receive(timeout);
}
return StaticResponseParser.ParseCapability(response);
}
internal SmtpResponseReader SendAndReceive(SmtpCommand command)
{
Send(command);
return Receive();
}
internal void Send(SmtpCommand command)
{
WriteLine(command.Text);
}
public bool AuthenticateXOAuth(string key)
{
var command = new SmtpCommand(string.Format("AUTH XOAUTH {0}", key));
return(_client.SendAndReceive(command).IsOk);
}
/// <summary>
/// Cram-MD5 authorization.
/// http://tools.ietf.org/html/rfc2195
/// </summary>
private bool AuthenticateCramMd5(NetworkCredential credentials)
{
var command = new SmtpCommand("AUTH CRAM-MD5");
var response = _client.SendAndReceive(command);
var base64 = response.CurrentLine.Substring(4).TrimEnd();
var challenge = Base64Encoder.Decode(base64, Encoding.UTF8);
var username = credentials.UserName;
var password = credentials.Password;
var hash = CramMd5Hasher.ComputeHash(password, challenge);
var authentication = username + " " + hash;
var reader = _client.SendAndReceive(new SmtpCommand(Base64Encoder.Encode(authentication)));
return reader.IsOk;
}
internal SmtpResponseReader SendAndReceive(SmtpCommand command)
{
Send(command);
return(Receive());
}
internal void Send(SmtpCommand command)
{
WriteLine(command.Text);
}
/// <summary>
/// Login authorization, same as plain but split into two separate command/responses.
/// http://tools.ietf.org/html/rfc4616
/// </summary>
private bool AuthenticateLogin(NetworkCredential credentials)
{
var command = new SmtpCommand("AUTH LOGIN");
var response = _client.SendAndReceive(command);
if (response.ResponseCode != 334) {
return false;
}
var username = Base64Encoder.Encode(credentials.UserName);
var userNameResponse = _client.SendAndReceive(new SmtpCommand(username));
if (userNameResponse.ResponseCode != 334) {
return false;
}
var password = Base64Encoder.Encode(credentials.Password);
var passwordResponse = _client.SendAndReceive(new SmtpCommand(password));
return passwordResponse.ResponseCode == ResponseCodes.AuthenticationSuccessful;
}
private SmtpResponseReader SendRecipients(Message message)
{
SmtpResponseReader reader = null;
var recipients = new List<EmailContact>();
recipients.AddRange(message.Ccs);
recipients.AddRange(message.Bccs);
recipients.AddRange(message.To);
recipients.RemoveDuplicates();
foreach (var recipient in recipients) {
var text = string.Format("RCPT TO:<{0}>", recipient.Address.FullAddress);
var command = new SmtpCommand(text);
reader = SendAndReceive(command);
if (reader.IsFatalOrErroneous) {
return reader;
}
}
return reader;
}
private SmtpResponseReader SendSenders(Message message)
{
SmtpResponseReader reader = null;
foreach (var from in message.From) {
var text = string.Format("MAIL FROM:<{0}>", from.Address.FullAddress);
var command = new SmtpCommand(text);
reader = SendAndReceive(command);
if (reader.IsFatalOrErroneous) {
return reader;
}
}
return reader;
}
public bool AuthenticateXOAuth(string key)
{
var command = new SmtpCommand(string.Format("AUTH XOAUTH {0}", key));
return _client.SendAndReceive(command).IsOk;
}