Hi bitfiddler,
Thank you for using the Support Forum. Yes you can enter individual e-mail addresses from the control panel of the machine. They would not have to be in the address book. Please see these instructions for sending an e-mail on the WorkCentre 3315/3325 and these instructions for the WorkCentre 6505. I hope you find this information helpful for answering your question. If you require additional information please consider contacting your support centre for further assistance.