private bool SendEHello()
{
IAsyncResult result = EHelloCommand.BeginSend(_connection, _connection._client.clientDomain, s_sendEHelloCallback, this);
if (result.CompletedSynchronously)
{
_connection._extensions = EHelloCommand.EndSend(result);
_connection.ParseExtensions(_connection._extensions);
// If we already have a TlsStream, this is the second EHLO cmd
// that we sent after TLS handshake compelted. So skip TLS and
// continue with Authenticate.
if (_connection._networkStream is TlsStream)
{
Authenticate();
return(true);
}
if (_connection.EnableSsl)
{
if (!_connection._serverSupportsStartTls)
{
// Either TLS is already established or server does not support TLS
if (!(_connection._networkStream is TlsStream))
{
throw new SmtpException(string.Format(Strings.MailServerDoesNotSupportStartTls));
}
}
SendStartTls();
}
else
{
Authenticate();
}
return(true);
}
return(false);
}
