public void sendVerificationEmail(final RegistrationRequestEntity entity, final String UID, @Nullable final boolean isSpecial) {
        AsyncTask.execute(new Runnable() {
            @Override
            public void run() {
                final String username = "robot@art-coral.com";
                final String password = "0Z8c1S3b";

                Properties props = new Properties();
                props.put("mail.smtp.auth", "true");
                props.put("mail.smtp.starttls.enable", "false");
                props.put("mail.smtp.host", "mail.art-coral.com");
                props.put("mail.smtp.port", "25");

                Session session = Session.getInstance(props,
                        new javax.mail.Authenticator() {
                            protected PasswordAuthentication getPasswordAuthentication() {
                                return new PasswordAuthentication(username, password);
                            }
                        });
                try {
                    Message message = new MimeMessage(session);
                    message.setFrom(new InternetAddress("robot@art-coral.com"));
                    message.setRecipients(Message.RecipientType.TO,
                            InternetAddress.parse(entity.getMail()));
                    message.setSubject(getString(R.string.message_email_title));

                    message.setText(
                            getString(R.string.message_email_message_1) + "\n\n" +
                            getString(R.string.message_email_message_2) +
                            "\n\n\n" +
                            getString(R.string.message_email_url) +
                            buildEncodedData(entity, UID, isSpecial) +
                            "\n\n\n" +
                            getString(R.string.message_email_message_3) + "\n\n" +
                            getString(R.string.registration_email_hint) + ": " + entity.getMail() + "\n" +
                            getString(R.string.registration_password_hint) + ": " + entity.getPass() +
                            "\n\n\n" +
                            getString(R.string.message_email_message_4)
                    );

                    Transport.send(message);

                } catch (MessagingException e) {
                    throw new RuntimeException(e);
                }
            }
        });

        notifyUser();
    }