Email not sending when using SMTP server on Qt 4 - c++

Question

I've been making a desktop app using Qt 4 and C++.
This is my code:
maiwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
connect(ui->sendBtn, SIGNAL(clicked()),this, SLOT(sendMail()));
connect(ui->exitBtn, SIGNAL(clicked()),this, SLOT(close()));
connect(ui->browseBtn, SIGNAL(clicked()), this, SLOT(browse()));
ui->paswd->setEchoMode(QLineEdit::Password);
}
void MainWindow::browse()
{
files.clear();
QFileDialog dialog(this);
dialog.setDirectory(QDir::homePath());
dialog.setFileMode(QFileDialog::ExistingFiles);
if (dialog.exec())
files = dialog.selectedFiles();
QString fileListString;
foreach(QString file, files)
fileListString.append( "\"" + QFileInfo(file).fileName() + "\" " );
ui->file->setText( fileListString );
}
void MainWindow::sendMail()
{
Smtp* smtp = new Smtp(ui->uname->text(), ui->paswd->text(), ui->server->text(), ui->port->text().toInt());
connect(smtp, SIGNAL(status(QString)), this, SLOT(mailSent(QString)));
if( !files.isEmpty() )
smtp->sendMail(ui->uname->text(), ui->rcpt->text() , ui->subject->text(),ui->msg->toPlainText(), files );
else
smtp->sendMail(ui->uname->text(), ui->rcpt->text() , ui->subject->text(),ui->msg->toPlainText());
}
void MainWindow::mailSent(QString status)
{
if(status == "Message sent")
QMessageBox::warning( 0, tr( "Qt Simple SMTP client" ), tr( "Message sent!\n\n" ) );
}
MainWindow::~MainWindow()
{
delete ui;
}
smtp.cpp
#include "smtp.h"
Smtp::Smtp( const QString &user, const QString &pass, const QString &host, int port, int timeout )
{
socket = new QSslSocket(this);
connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
connect(socket, SIGNAL(connected()), this, SLOT(connected() ) );
connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this,SLOT(errorReceived(QAbstractSocket::SocketError)));
connect(socket, SIGNAL(stateChanged(QAbstractSocket::SocketState)), this, SLOT(stateChanged(QAbstractSocket::SocketState)));
connect(socket, SIGNAL(disconnected()), this,SLOT(disconnected()));
this->user = user;
this->pass = pass;
this->host = host;
this->port = port;
this->timeout = timeout;
}
void Smtp::sendMail(const QString &from, const QString &to, const QString &subject, const QString &body, QStringList files)
{
message = "To: " + to + "\n";
message.append("From: " + from + "\n");
message.append("Subject: " + subject + "\n");
//Let's intitiate multipart MIME with cutting boundary "frontier"
message.append("MIME-Version: 1.0\n");
message.append("Content-Type: multipart/mixed; boundary=frontier\n\n");
message.append( "--frontier\n" );
//message.append( "Content-Type: text/html\n\n" ); //Uncomment this for HTML formating, coment the line below
message.append( "Content-Type: text/plain\n\n" );
message.append(body);
message.append("\n\n");
if(!files.isEmpty())
{
qDebug() << "Files to be sent: " << files.size();
foreach(QString filePath, files)
{
QFile file(filePath);
if(file.exists())
{
if (!file.open(QIODevice::ReadOnly))
{
qDebug("Couldn't open the file");
QMessageBox::warning( 0, tr( "Qt Simple SMTP client" ), tr( "Couldn't open the file\n\n" ) );
return ;
}
QByteArray bytes = file.readAll();
message.append( "--frontier\n" );
message.append( "Content-Type: application/octet-stream\nContent-Disposition: attachment; filename="+ QFileInfo(file.fileName()).fileName() +";\nContent-Transfer-Encoding: base64\n\n" );
message.append(bytes.toBase64());
message.append("\n");
}
}
}
else
qDebug() << "No attachments found";
message.append( "--frontier--\n" );
message.replace( QString::fromLatin1( "\n" ), QString::fromLatin1( "\r\n" ) );
message.replace( QString::fromLatin1( "\r\n.\r\n" ),QString::fromLatin1( "\r\n..\r\n" ) );
this->from = from;
rcpt = to;
state = Init;
socket->connectToHostEncrypted(host, port); //"smtp.gmail.com" and 465 for gmail TLS
if (!socket->waitForConnected(timeout)) {
qDebug() << socket->errorString();
}
t = new QTextStream( socket );
}
Smtp::~Smtp()
{
delete t;
delete socket;
}
void Smtp::stateChanged(QAbstractSocket::SocketState socketState)
{
qDebug() <<"stateChanged " << socketState;
}
void Smtp::errorReceived(QAbstractSocket::SocketError socketError)
{
qDebug() << "error " <<socketError;
}
void Smtp::disconnected()
{
qDebug() <<"disconneted";
qDebug() << "error " << socket->errorString();
}
void Smtp::connected()
{
qDebug() << "Connected ";
}
void Smtp::readyRead()
{
qDebug() <<"readyRead";
// SMTP is line-oriented
QString responseLine;
do
{
responseLine = socket->readLine();
response += responseLine;
}
while ( socket->canReadLine() && responseLine[3] != ' ' );
responseLine.truncate( 3 );
qDebug() << "Server response code:" << responseLine;
qDebug() << "Server response: " << response;
if ( state == Init && responseLine == "220" )
{
// banner was okay, let's go on
*t << "EHLO localhost" <<"\r\n";
t->flush();
state = HandShake;
}
//No need, because I'm using socket->startClienEncryption() which makes the SSL handshake for you
/*else if (state == Tls && responseLine == "250")
{
// Trying AUTH
qDebug() << "STarting Tls";
*t << "STARTTLS" << "\r\n";
t->flush();
state = HandShake;
}*/
else if (state == HandShake && responseLine == "250")
{
socket->startClientEncryption();
if(!socket->waitForEncrypted(timeout))
{
qDebug() << socket->errorString();
state = Close;
}
//Send EHLO once again but now encrypted
*t << "EHLO localhost" << "\r\n";
t->flush();
state = Auth;
}
else if (state == Auth && responseLine == "250")
{
// Trying AUTH
qDebug() << "Auth";
*t << "AUTH LOGIN" << "\r\n";
t->flush();
state = User;
}
else if (state == User && responseLine == "334")
{
//Trying User
qDebug() << "Username";
//GMAIL is using XOAUTH2 protocol, which basically means that password and username has to be sent in base64 coding
//https://developers.google.com/gmail/xoauth2_protocol
*t << QByteArray().append(user).toBase64() << "\r\n";
t->flush();
state = Pass;
}
else if (state == Pass && responseLine == "334")
{
//Trying pass
qDebug() << "Pass";
*t << QByteArray().append(pass).toBase64() << "\r\n";
t->flush();
state = Mail;
}
else if ( state == Mail && responseLine == "235" )
{
// HELO response was okay (well, it has to be)
//Apperantly for Google it is mandatory to have MAIL FROM and RCPT email formated the following way -> <email#gmail.com>
qDebug() << "MAIL FROM:<" << from << ">";
*t << "MAIL FROM:<" << from << ">\r\n";
t->flush();
state = Rcpt;
}
else if ( state == Rcpt && responseLine == "250" )
{
//Apperantly for Google it is mandatory to have MAIL FROM and RCPT email formated the following way -> <email#gmail.com>
*t << "RCPT TO:<" << rcpt << ">\r\n"; //r
t->flush();
state = Data;
}
else if ( state == Data && responseLine == "250" )
{
*t << "DATA\r\n";
t->flush();
state = Body;
}
else if ( state == Body && responseLine == "354" )
{
*t << message << "\r\n.\r\n";
t->flush();
state = Quit;
}
else if ( state == Quit && responseLine == "250" )
{
*t << "QUIT\r\n";
t->flush();
// here, we just close.
state = Close;
emit status( tr( "Message sent" ) );
}
else if ( state == Close )
{
deleteLater();
return;
}
else
{
// something broke.
QMessageBox::warning( 0, tr( "Qt Simple SMTP client" ), tr( "Unexpected reply from SMTP server:\n\n" ) + response );
state = Close;
emit status( tr( "Failed to send message" ) );
}
response = "";
}
I wanted to use SMTP server to send emails but i had this error:
No attachments found
stateChanged QAbstractSocket::HostLookupState
stateChanged QAbstractSocket::ConnectingState
stateChanged QAbstractSocket::ConnectedState
qt.network.ssl: QSslSocket: cannot call unresolved function SSLv23_client_method
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_CTX_new
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_library_init
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
error QAbstractSocket::SocketError(21)
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
error QAbstractSocket::SocketError(20)
Connected
error QAbstractSocket::RemoteHostClosedError
stateChanged QAbstractSocket::ClosingState
stateChanged QAbstractSocket::UnconnectedState
disconneted
error "The remote host closed the connection"
error QAbstractSocket::RemoteHostClosedError
stateChanged QAbstractSocket::ClosingState "
So basically it connected to my email but didn't send the message and it closed the connection after.
I tried installing OpenSSL and including it to my project but nothing has changed.