Node.Js: Can't deploy using 'nodemailer' with openshift

I'm trying to use 'nodemailer' on my server, which works perfectly locally. But, whenever I'm deploying on Openshift I get 'control-start' error.

remote: Waiting for application port (8080) become available ...
remote: Application '****' failed to start (port 8080 not available)
remote: -------------------------
remote: Git Post-Receive Result: failure
remote: Activation status: failure

Any ideas?

Thanks!

via Chen Bachar