On this page, you can subscribe to any of several email lists, which you may find useful.
All are free of charge, and you can unsubscribe at any time by simply replying to any message you receive, with the word UNSUBSCRIBE in the subject line. All emails to each list are always sent out BCC, which means that neither your email address will be visible to other subscribers, nor will other subscribers' email addresses be available to you. You may respond to me to any of them, by simply hitting the "reply" button, the same as any other email.