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SMTP Client for Qt (C++)

The SmtpClient for Qt is small library writen for Qt 4 (C++ version) that allows application to send complex emails (plain text, html, attachments, inline files, etc.) using the Simple Mail Transfer Protocol (SMTP).

SMPT 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


Lets see a simple example:

#include <QtGui/QApplication>
#include "../src/SmtpMime"

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

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

    // First we need to create an SmtpClient object
    // We will use the Gmail's smtp server (, port 465, ssl)

    SmtpClient smtp("", 465, SmtpClient::SslConnection);

    // We need to set the username (your email address) and the password
    // for smtp authentification.


    // Now we create a MimeMessage object. This will be the email.

    MimeMessage message;

    message.setSender(new EmailAddress("", "Your Name"));
    message.addRecipient(new EmailAddress("", "Recipient's Name"));
    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


    // Now we can send the mail



For more examples see the Wiki/Examples.


This project (all files including the demos/examples) is licensed under the GNU GPL version 2.0.

Copyright (c) 2011 - Tőkés Attila