Derek - re 'cache' in mail.app -- deleting those pesky addresses. Under Window, there's a choice ADDRESS HISTORY. These are all or many of the addresses you have received email from (including spam too!) and there is a button REMOVE FROM HISTORY. I assume you can select them all (with Command-A ?) and remove them all that way. Good luck David PS You can also pick and choose which ones you want to ADD to the address book from the same ADDRESS HISTORY window ======================================== David Ferleger, Esq. 10 Presidential Blvd, Suite 115 Bala Cynwyd, PA 19004 610-668-2221 610-668-3889 fax http://www.ferleger.com Web Site for Legal, Disability & Jewish Links / Come visit! email mailto:david at ferleger.com ======================================== Exchange of email does not establish a lawyer-client relationship. It is my practice not to provide legal advice by email.