SMTP Client for Qt (C++) - Version 2.0

The SmtpClient for Qt is small library written for Qt 5 / 6 (C++ version) that allows application to send complex emails (plain text, html, attachments, inline files, etc.) using the Simple Mail Transfer Protocol (SMTP).

New in version 2.0:

Asynchronous & Synchronous working mode
Qt5/6 compatibility
Building as a shared library
code of SmtpClient refactored and partially rewrited

New in version 1.1:

TLS (STARTTLS) connection is now supported
multiple types of recipients (to, cc, bcc)
nested mime emails (mixed/alternative, mixed/related)
output compilant with RFC2045

SMTP Client for Qt supports

TCP and SSL connections to SMTP servers
SMTP authentication (PLAIN and LOGIN methods)
sending MIME emails (to multiple recipients)
plain text and HTML (with inline files) content in emails
multiple attachments and inline files (used in HTML)
different character sets (ascii, utf-8, etc) and encoding methods (7bit, 8bit, base64)
error handling

Examples

Lets see a simple example:

#include <QtCore>
#include "../src/SmtpMime"

int main(int argc, char *argv[])
{
{
    QCoreApplication a(argc, argv);

    // This is a first demo application of the SmtpClient for Qt project

    // Now we create a MimeMessage object. This is the email.

    MimeMessage message;

    EmailAddress sender("your_email_address@host.com", "Your Name");
    message.setSender(sender);

    EmailAddress to("recipient@host.com", "Recipient's Name");
    message.addRecipient(to);

    message.setSubject("SmtpClient for Qt - Demo");

    // Now add some text to the email.
    // First we create a MimeText object.

    MimeText text;

    text.setText("Hi,\nThis is a simple email message.\n");

    // Now add it to the mail

    message.addPart(&text);

    // Now we can send the mail
    SmtpClient smtp("smtp.gmail.com", 465, SmtpClient::SslConnection);

    smtp.connectToHost();
    if (!smtp.waitForReadyConnected()) {
        qDebug() << "Failed to connect to host!";
        return -1;
    }

    smtp.login("your_email_address@host.com", "your_password");
    if (!smtp.waitForAuthenticated()) {
        qDebug() << "Failed to login!";
        return -2;
    }

    smtp.sendMail(message);
    if (!smtp.waitForMailSent()) {
        qDebug() << "Failed to send mail!";
        return -3;
    }

    smtp.quit();

}

For more examples see the Wiki/Examples.

License

This project (all files including the demos/examples) is licensed under the GNU LGPL, version 2.1.