Is my client [name withheld] mentally unbalanced or are all the things she described in her email truly happening as she perceives? Will she be helped by my Protocol session, and to what extent?

As you saw intuitively, she is disturbed and most of her ideas are delusional with respect to those around her. It is a function of her inner fear causing her to perceive threats from outsiders, even loved ones. This is a perfect illustration of the depravity sought and encouraged by spirit meddler attachments to corrupt not only the individual but their special relationship with life partners and other loved ones. She will benefit from Protocol work, especially the new version that will be ongoing now through repetition.