Отправка email средствами SMTP виде HTML

#ifndef EMAILSENDER_H
#define EMAILSENDER_H
 
#include "message.h"
 
#include <QTcpSocket>
#include <QDateTime>
 
class EMailSender : public QObject
{
    Q_OBJECT
public:
    EMailSender(const QString &host, const QString &login, const QString &password, int timeout = 3000, QObject *parent = 0);
    bool sendMessage(const Message &message, const QString &from, const QString &to);
 
signals:
    void signalConnected();
    void signalDisconnected();
    void signalLog(const QString &log);
    void signalSendResult(bool isOk);
 
protected:
    QString mailTimestamp() const;
    QString readLine();
    QString exchangeMessages(const QString &sendData);
    QString checkedExchangeMessage(const QString &message);
    int responseCode(const QString &message);
 
    QString mSmtpHost;
    QString mLogin;
    QString mPassword;
 
    QTcpSocket *pSocket;
    QTextStream *pSocketStream;
    int mTimeout;
 
    static const int CONNECT_PORT = 25;
};
 
#endif // EMAILSENDER_H

#include "emailsender.h"
 
EMailSender::EMailSender(const QString &host, const QString &login, const QString &password, int timeout, QObject *parent)
    : QObject(parent), mSmtpHost(host), mLogin(login), mPassword(password), mTimeout(timeout)
{
 
    pSocket = new QTcpSocket(this);
    connect(pSocket, SIGNAL(connected()), SIGNAL(signalConnected()));
    connect(pSocket, SIGNAL(disconnected()), SIGNAL(signalDisconnected()));
}
 
bool EMailSender::sendMessage(const Message &message, const QString &from, const QString &to)
{
 
    QString m_sMessage;
    m_sMessage = mailTimestamp() + "\n";
    m_sMessage.append("User-Agent: Clever Alloy 1.0.0 (WinXP)\n");
    m_sMessage.append("X-Accept-Language: en-us, en\n");
    m_sMessage.append("MIME-Version: 1.0\n");
    m_sMessage.append("To: " + to + "\n");
    m_sMessage.append("From: " + from + " <" + from + ">\n");
    m_sMessage.append("Subject: " + message.subject + "\n");
    m_sMessage.append("Content-Type: text/html; charset=UTF-8;\n");
    m_sMessage.append("Content-transfer-encoding: 7BIT\n\n\n\n");
    m_sMessage=message.body;
    m_sMessage.replace(QString::fromLatin1("\n"), QString::fromLatin1("\r\n"));
    m_sMessage.replace(QString::fromLatin1("\r\n.\r\n"),QString::fromLatin1("\r\n..\r\n"));
 
    pSocket->connectToHost(mSmtpHost, CONNECT_PORT);
    pSocket->waitForConnected();
    pSocketStream = new QTextStream(pSocket);
 
    QString recv = readLine();
    int code = responseCode(recv);
    emit signalLog(QString("### Connection status: %1").arg(QString::number(code)));
    if (code != 220) {
        pSocket->disconnectFromHost();
        return false;
    }
 
    recv = checkedExchangeMessage("ehlo localhost");
    if (recv.isEmpty()) {
        return false;
    }
 
    recv = checkedExchangeMessage("AUTH LOGIN");
    if (recv.isEmpty()) {
        return false;
    }
 
    recv = checkedExchangeMessage(mLogin.toUtf8().toBase64());
    if (recv.isEmpty()) {
        return false;
    }
 
    recv = checkedExchangeMessage(mPassword.toUtf8().toBase64());
    if (recv.isEmpty() || !recv.contains("ok", Qt::CaseInsensitive)) {
        return false;
    }
 
    recv = checkedExchangeMessage("MAIL FROM: " + from);
    if (recv.isEmpty()) {
        return false;
    }
 
    recv = checkedExchangeMessage("RCPT TO: " + to);
    if (recv.isEmpty()) {
        return false;
    }
 
 
    recv = checkedExchangeMessage("DATA");
    if (recv.contains("not", Qt::CaseInsensitive)) {
        return false;
    }
 
    recv = checkedExchangeMessage(m_sMessage + "\r\n.");
    if (recv.size() && recv.contains("ok", Qt::CaseInsensitive)) {
        pSocket->disconnectFromHost();
        return true;
    }
 
    return false;
}
 
QString EMailSender::mailTimestamp() const
{
    QDate timecute;
    const QDateTime dt = QDateTime::currentDateTime();
    const QString day_en = timecute.shortDayName(timecute.day());
    const QString month_en = timecute.shortMonthName(timecute.month());
    const QString last = dt.toString("yyyy hh:mm:ss");
    return QString( "Date: %1, %2 %3 %4 +0200" ).arg(day_en, QString::number(timecute.day()), month_en, last);
}
 
QString EMailSender::readLine()
{
    QString sIncommingData;
    if (pSocket->waitForReadyRead(mTimeout))
    {
        while (!pSocketStream->atEnd())
        {
            const QString sOpera = pSocketStream->readLine();
            sIncommingData = sOpera + "\n" + sIncommingData;
            emit signalLog("### Recv: " + sIncommingData);
        }
    }
    return sIncommingData;
}
 
QString EMailSender::exchangeMessages(const QString &sendData)
{
    emit signalLog("### Send " + sendData);
    *pSocketStream << sendData << "\r\n";
    pSocketStream->flush();
    return readLine();
}
 
QString EMailSender::checkedExchangeMessage(const QString &message)
{
    QString response = exchangeMessages(message);
    if (response.isEmpty()) {
        pSocket->disconnectFromHost();
    }
    return response;
}
 
int EMailSender::responseCode(const QString &message)
{
    return message.left(3).toInt();
}

#ifndef MESSAGE_H
#define MESSAGE_H
 
#include <QString>
 
struct Message
{
    QString body;
    QString subject;
};
 
#endif // MESSAGE_H

        Message msg;
        msg.subject = "test";
        msg.body = "It works";
        mSender->sendMessage(msg, "name@gmail.com", MailAddress);

        Message msg;
        msg.subject = "test";
        msg.body = "<p><font style="background-color:#ff0000;">Super</font></p>";
        mSender->sendMessage(msg, "name@gmail.com", MailAddress);