I suggest you arrange to meet in person with a MA trial attorney familiar with Internet law issues. Not every lawyer is familiar with these niche issues.
Depending on the particular facts, you (and your daughter) may have joint and separate claims for state law defamation (libel and/or slander), invasion of privacy, violation of separate rights of publicity, as well as intentional infliction of emotional distress. You may also have statutory protection against claims for defamation or invasion of privacy under the Communications Decency Act of 1996, a federal statute (47 U.S.C. sec. 230 (f)(3)).
Many states are criminalizing cyberbullying and online harassment. You may be entitled to a restraining order and may be able to press criminal charges if you reach out to the district attorney or town prosecutor.
This response is offered for general guidance. Do not rely on this information as legal advice. No attorney-client relationship is created by the exchange of emails alone.