Send email with Express and EmailJS

I try to send email with EmailJS module for Express but it works only in local, it doesn't work in remote (AppFog)... I don't understand the problem...

var email   = require("emailjs");

var server = email.server.connect({
    user: "******",
    password: "******",
    host: "smtp.gmail.com",
    ssl: true
});

var send = function(message, from, subject) {
    server.send({
        text:    message,
        from:    from,
        to:      "******** <*********>",
        subject: subject
    });
}

exports.index = function(req, res) {
    res.render('contact', {
        emailSuccess: false,
        title: "my title"
    });
}

exports.send = function(req, res) {
    send(req.body.message, req.body.from, req.body.subject);
    res.render('contact', {
        emailSuccess: true,
        title: "my title"
    });
}