What a legend! Data Overwrite Security disables scanning to both email and folder amongst other bits and bobs, so that is probably your solution. You could check out the service manual for this option at s_dos_ab[1].pdf or, as it doesn't say how to do it in the manual, ring the Ricoh "help"desk and ask them how to turn it off.
A pound to a pinch of snuff that this sorts it.
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