/// <summary>
/// Is called when AUTH command has completed.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>op</b> is null reference.</exception>
private void AuthCommandCompleted(SMTP_Client.AuthAsyncOP op)
{
if(op == null){
throw new ArgumentNullException("op");
}
try{
if(op.Error != null){
Dispose(op.Error);
}
else{
long messageSize = -1;
try{
messageSize = m_pRelayItem.MessageStream.Length - m_pRelayItem.MessageStream.Position;
}
catch{
// Stream doesn't support seeking.
}
SMTP_Client.MailFromAsyncOP mailOP = new SMTP_Client.MailFromAsyncOP(
this.From,
messageSize,
IsDsnSupported() ? m_pRelayItem.DSN_Ret : SMTP_DSN_Ret.NotSpecified,
IsDsnSupported() ? m_pRelayItem.EnvelopeID : null
);
mailOP.CompletedAsync += delegate(object s,EventArgs<SMTP_Client.MailFromAsyncOP> e){
MailCommandCompleted(mailOP);
};
if(!m_pSmtpClient.MailFromAsync(mailOP)){
MailCommandCompleted(mailOP);
}
}
}
catch(Exception x){
Dispose(x);
}
}
/// <summary>
/// Is called when EHLO/HELO command has completed.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>op</b> is null reference.</exception>
private void EhloCommandCompleted(SMTP_Client.EhloHeloAsyncOP op)
{
if(op == null){
throw new ArgumentNullException("op");
}
try{
if(op.Error != null){
Dispose(op.Error);
}
else{
// Start TLS requested, start switching to secure.
if(!m_pSmtpClient.IsSecureConnection && ((m_pServer.UseTlsIfPossible && IsTlsSupported()) || m_pActiveTarget.SslMode == SslMode.TLS)){
SMTP_Client.StartTlsAsyncOP startTlsOP = new SMTP_Client.StartTlsAsyncOP(null);
startTlsOP.CompletedAsync += delegate(object s,EventArgs<SMTP_Client.StartTlsAsyncOP> e){
StartTlsCommandCompleted(startTlsOP);
};
if(!m_pSmtpClient.StartTlsAsync(startTlsOP)){
StartTlsCommandCompleted(startTlsOP);
}
}
// Authentication requested, start authenticating.
else if(!string.IsNullOrEmpty(m_pActiveTarget.UserName)){
SMTP_Client.AuthAsyncOP authOP = new SMTP_Client.AuthAsyncOP(m_pSmtpClient.AuthGetStrongestMethod(m_pActiveTarget.UserName,m_pActiveTarget.Password));
authOP.CompletedAsync += delegate(object s,EventArgs<SMTP_Client.AuthAsyncOP> e){
AuthCommandCompleted(authOP);
};
if(!m_pSmtpClient.AuthAsync(authOP)){
AuthCommandCompleted(authOP);
}
}
// Start MAIL command.
else{
long messageSize = -1;
try{
messageSize = m_pRelayItem.MessageStream.Length - m_pRelayItem.MessageStream.Position;
}
catch{
// Stream doesn't support seeking.
}
SMTP_Client.MailFromAsyncOP mailOP = new SMTP_Client.MailFromAsyncOP(
this.From,
messageSize,
IsDsnSupported() ? m_pRelayItem.DSN_Ret : SMTP_DSN_Ret.NotSpecified,
IsDsnSupported() ? m_pRelayItem.EnvelopeID : null
);
mailOP.CompletedAsync += delegate(object s,EventArgs<SMTP_Client.MailFromAsyncOP> e){
MailCommandCompleted(mailOP);
};
if(!m_pSmtpClient.MailFromAsync(mailOP)){
MailCommandCompleted(mailOP);
}
}
}
}
catch(Exception x){
Dispose(x);
}
}