No MimeMessage content when sending a SimpleMailMessage

I am trying to send an email from my web app but I have a very strange error.

org.springframework.mail.MailSendException: Failed messages: javax.mail.MessagingException: IOException while sending message;
nested exception is: java.io.IOException: No MimeMessage content

This is my Mail class

public class Mail {

    private String from;
    private String subject;
    private String replyTo;
    private String text;
    private String to;

    public String getFrom() {
        return from;
    }

    public void setFrom(String from) {
        this.from = from;
    }

    public String getSubject() {
        return subject;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    public String getReplyTo() {
        return replyTo;
    }

    public void setReplyTo(String replyTo) {
        this.replyTo = replyTo;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

    public String getTo() {
        return to;
    }

    public void setTo(String to) {
        this.to = to;
    }

    public Mail(String from, String subject, String replyTo, String text) {
        this.from = from;
        this.subject = subject;
        this.replyTo = replyTo;
        this.text = text;
    }

    public Mail() {
    }

}

My EmailService

@Service
public class EmailService {

    @Autowired
    private JavaMailSender emailSender;

    public void sendSimpleMessage(final Mail mail) {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(mail.getFrom());
        message.setSubject(mail.getSubject());
        message.setReplyTo(mail.getReplyTo());
        message.setTo(mail.getTo());
        message.setText(mail.getText());
        emailSender.send(message);
    }

}

my controller

@Controller
public class ContactController {

    private static Logger LOG = LoggerFactory.getLogger(ContactController.class);

    @Autowired
    EmailService emailService;


    @RequestMapping(value= "contact", method = RequestMethod.GET)
    public ModelAndView contactPage() {
        Mail mail = new Mail();
        ModelAndView mav = new ModelAndView();
        mav.setViewName(Constants.CONTACT);
        mav.addObject("mail", mail);
        mav.addObject(Constants.TITLE, "Contact");
        return mav;
    }

    @RequestMapping(value="/contact", method = RequestMethod.POST)
    public String sendContactEmail(Model model, RedirectAttributes ra) {
        try {
            Mail mail = new Mail();

            mail.setFrom(mail.getFrom());
            mail.setSubject(mail.getSubject());
            mail.setReplyTo(mail.getReplyTo());
            mail.setText(mail.getText());

            mail.setTo("[email protected]");
            emailService.sendSimpleMessage(mail);

            LOG.info("Email Successfully Sended");
            ra.addFlashAttribute("success", 1);
            return "redirect:/contact";
        } catch (MailSendException e) {
            ra.addFlashAttribute("error", 1);
            LOG.error("ERROR SENDING EMAIL", e);
            return "redirect:/contact";
        }
    }

}

and my sight

<form th:action="@{/contact}" th:object="${mail}" method="POST">
    <div class="form-group row">
        <label for="inputName"
            class="col-sm-2 col-form-label text-right text-sm-center text">
            <i class="fas fa-user"></i>
        </label>
        <div class="col-sm-10">
            <input th:field="*{from}" type="text" class="form-control"
                id="inputName" autocomplete="off" placeholder="Name">
        </div>
    </div>

    <div class="form-group row">
        <label for="inputName"
            class="col-sm-2 col-form-label text-right text-sm-center"> <i
            class="fas fa-pencil-alt"></i>
        </label>
        <div class="col-sm-10">
            <input th:field="*{subject}" type="text" class="form-control"
                id="inputName" autocomplete="off" placeholder="Subject">
        </div>
    </div>

    <div class="form-group row">
        <label for="inputEmail"
            class="col-sm-2 col-form-label text-right text-sm-center"> <i
            class="fas fa-at"></i>
        </label>
        <div class="col-sm-10">
            <input th:field="*{replyTo}" type="email" class="form-control"
                id="inputEmail" autocomplete="off" placeholder="Email">
        </div>
    </div>

    <div class="form-group row">
        <label for="inputMessage"
            class="col-sm-2 col-form-label text-right text-sm-center"> <i
            class="fas fa-envelope"></i>
        </label>
        <div class="col-sm-10">
            <textarea th:field="*{text}" cols="30" rows="10" class="form-control"
                id="inputMessage" placeholder="Message">
                            </textarea>
        </div>
    </div>

    <button type="submit" class="btn btn-contact-7technology w-100">
        <span>SEND MESSAGE</span>
    </button>
</form>

Debugging the code I have realized that this line

mail.setText(mail.getText()); 

null always comes, something very rare since I write a message in the Textearea. All the other fields arrive perfectly and if I forcefully pass a String to my setText method, the mail arrives correctly with that String, but obviously I want the user to send an email with the message they want.

Best regards.