Several users and non-users have commented that, since all the mail addresses are sent to the InterGuru server for processing, I could be collecting the addresses for my own use. I could be, but am not doing so. If you want to test me, put your own address in the list with a fake name.such as "This address was stolen " <youraddress@yourISP.com> If you get any mail to that name, you will know that it came from me.
For programs that will do the conversion right on your machine see Address Magic (Windows only). and Dawn (UNIX and Windows). No one has complained to me about these programs. While it is possible that these programs contain a "Trojan Horse " that can steal your addresses, it is a remote possiblilty. Address Magic and Dawn have been in use for a while, and no one has complained. If you are really paranoid put a fake address in your list as discussed above.