Error sending email using Javamailsender - Microsoft Exchange 10

Question

Good morning!

I cannot send the email. All the settings I tried to use return the same error:

WARN  o.s.w.s.m.a.ResponseStatusExceptionResolver - Resolved [org.springframework.web.server.ResponseStatusException: 400 BAD_REQUEST "Mail server connection failed; nested exception is com.sun.mail.util.MailConnectException: Couldn't connect to host, port: exchange-ipa.dominio.su.net, 25; timeout -1;
java.net.ConnectException: Connection timed out: connect. Failed messages: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: exchange-ipa.dominio.su.net, 25; timeout -1;

I am using Spring boot - Javamailsender, according to the code below.

With another email that we have here at the company, send without problems.

Can help me?

Thank you in advance.

Follow the email configs:

Caixa Postal SMTP: [email protected]
Domínio\Usuário: Dominio\UJDLKSHFDUH012
Senha: Psjkj1#48K
Host: exchange-ipa.dominio.su.net
Porta: 25 (tentei com a 587 também)

Follow the source:

static final String dsEmail = "Dominio\\UJDLKSHFDUH012";
static final String dsSenha = "Psjkj1#48K";
    
public void enviarEmail(String login, String email, String token, String mensagem, String assunto) throws MailException, MessagingException {

        Global.getSetTokenConfirmaEmail(email.toLowerCase(), token, true, false);
        
        JavaMailSender emailSender = mailSender();
        MimeMessage message = emailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message, true);
        
        helper.setTo(email.toLowerCase());
        helper.setSubject(assunto);
        helper.setFrom("[email protected]");
        helper.setSentDate(new Date());
        helper.setText(mensagem, true);
        
        try {

            emailSender.send(message);

     } catch (Exception e) {

            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, e.getMessage());
     }
    }
    
    public JavaMailSender mailSender() {
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        
        mailSender.setHost("exchange-ipa.dominio.su.net");
        mailSender.setPort(25);
        
        mailSender.setDefaultEncoding("UTF-8");
        
        mailSender.setUsername(dsUsuario);
        mailSender.setPassword(dsSenha);

        Properties props = mailSender.getJavaMailProperties();
        
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.auth", true);
        props.put("mail.smtp.starttls.enable", true);
        props.put("mail.smtp.connectiontimeout", true);
        
         mailSender.setJavaMailProperties(props);

        return mailSender;
    }

Answer 1

Is working.

I’m not sure if the problem was in this configuration :

props.put("mail.smtp.starttls.enable", true); //alterei para false

or if the team that manages the servers has changed something there for the release, anyway, the code above works.

Thank you