Android JavaMail使用Exchange服务器发送邮件

Question

I'm trying to send an email using my company server but something doesn't work.

private Properties _setProperties() {


    _port = 443;
    _sport = 443;
    Properties props = (Properties) System.getProperties().clone();

    props.put("mail.smtps.host", _host);
    props.put("mails.debug", "true");
    props.put("mail.smtps.auth", "true");

    props.put("mail.smtps.port", _port);
    props.put("mail.smtps.ssl.port", "true");
    props.put("mail.smtps.ssl.socketFactory.port", _sport);
    props.put("mail.smtps.ssl.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
    props.put("mail.smtps.ssl.socketFactory.fallback", "false");

    return props;
}

public boolean send() throws Exception {
    Properties props = _setProperties();

    _user = "email";
    _pass = "pass";

    Session session = Session.getInstance(props, this);
    session.setDebug(true);

    MimeMessage msg = new MimeMessage(session);
    msg.setFrom(new InternetAddress(_user));
    msg.setRecipients(MimeMessage.RecipientType.TO, "mailTO");
    msg.setSubject("SUBJECT");
    msg.setSentDate(new Date());
    msg.setText("TEXT");

    // send email
    Transport transport = session.getTransport("smtps");
    transport.connect();
    transport.sendMessage(msg, msg.getAllRecipients());
    transport.close();

    return true;

}

The debug shows the following:

DEBUG: setDebug: JavaMail version 1.5.5

DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle]

DEBUG SMTP: need username and password for authentication

DEBUG SMTP: useEhlo true, useAuth true

DEBUG SMTP: trying to connect to host "companyServer", port 443, isSSL true

Keeps trying to connect and doesn't give any answer. When I set the mail.smtps.writetimeout it returns me java.net.SocketException: Socket closed

Any idea? :S

Answer 1

Keep noted that all Outlook clients use either MAPI or MAPI-over-http (MAC used EWS). Therefore most Exchange administrators might not have allowed users to use SMTP and therefore it might not be working as you expect.

Did you checked with your MS Exchange administrator if you can use SMTP via that way?