Barracuda Email Security Service (ESS) now allows admins to select how to handle emails when SPF checks fail for incoming emails. SPF has two different kind of failure modes – hardfail and softfail. ESS allows you to decide how to handle each different kind of failure separately.
For each type of failure, we can set different options like Block/Quarantine/Off. You will find this under Inbound Settings -> Sender Authentication
See screenshot below.