You would need to subscribe to a few mailing lists:
When posting a message to the mailing lists You must tag the message with an appropriate subject! In case you want to send out a message related to the Fuel@OPNFV project please tag the subject by providing the following text to the e-mail subject field: [opnfv-tech-discuss][fuel]<subject>
In general, the "opnfv-tech-discuss" mailing list is quite busy, in many cases too busy to handle, it is advisable to set-up remote filters, this can be done here