Hiya not sure I understand what you are saying Sue. But there are malicious bits of software that can hijack your address book and send e mails without you knowing? If this is appropriate put an address in your address book of aaaaaaaaaaa@noreply.aa It will be the first entry in your mail book and because it is an invalid address, will scupper the program from cycling through the rest of your addresses. If I got it wrong, sorry.