You do not need to send any personal details at all to use Waldomaths. I intend to keep Waldomaths as a free and anonymous resource for the foreseeable future.
If you want a reply, of course, you must give me a valid email address to reply to. If you do supply an email address then I will not keep it beyond making a single reply, unless you specifically ask me to do so. Without that request I will delete your address from my records immediately.
If you join the mailing list ...
If you join the mailing list your email will be held on a secure server, and will not be shared with anyone else. I don't spam - ever! I don't pass on email addresses - ever!
Your email will never be passed on to or shared with anyone else.