The Copyright Office does not maintain a mailing list. The Copyright Office sends periodic email messages via NewsNet (https://www.copyright.gov/newsnet/), a free electronic mailing list. Important announcements and new or changed regulations and the like are published in the Federal Register at http://www.access.gpo.gov/nara/index.html#fr. Most will also appear on the Copyright Office website on the Internet.
This article is intended to be helpful and informative. But even common legal matters can become complex and stressful. A qualified intellectual property lawyer can address your particular legal needs, explain the law, and represent you in court. Take the first step now and contact a local intellectual property attorney to discuss your specific legal situation.