You can use a service like Dropbox, Wetransfer or Rapidshare to send us your data. Please make sure your tracks are in 24bit/44.1khz (at least) as Wav. or Aiff.
Please remove all Plugins from your masterbus and make sure there is around -6dbfs headroom.
If you have questions about how you should send us your data, please don`t hesitate to contact us.