Verizon has sent out information to its corporate customers with more specifics about its iPhone pre-orders and launch. According to an e-mail received by Mac Rumors, Verizon will begin accepting pre-orders from existing customers at 3:00 a.m. Eastern Time on February 3. The e-mail states that customers will need to have their My Verizon self-serve account set-up online prior to the opening of the pre-order window, as orders can only be placed through…