Hi,Handsets are a mix of 7971GE, 7975G and 7937G, PBX is a UC520-32U-8FXO-K9, switch is a WS-C4506 with gig PoE blades.I wiped our UC520 and installed software pack 8.6.2 fresh, then re-configured to meet our spec.I can not get CUE to send an email t...