<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host" value="smtp.mailtrap.io"/>
        <property name="port" value="25"/>
        <property name="username" value="30f4d***44754"/>
        <property name="password" value="16a83***17add6"/>
        <property name="javaMailProperties">
            <props>
                <prop key="mail.transport.protocol">smtp</prop>
                <prop key="mail.smtp.auth">true</prop>
            </props>
        </property>
    </bean>

@Autowired
    private JavaMailSender mailSender;

    @RequestMapping(value = "/emailForm",method = RequestMethod.GET)
    public String doSendEmail() {
        SimpleMailMessage email = new SimpleMailMessage();
        email.setTo("key@wp.pl");
        email.setSubject("LOL");
        email.setText("heh");

        // sends the e-mail
        mailSender.send(email);

        // forwards to the view named "Result"
        return "Result";
    }