Here, the investigators conduct a large, international, multicenter RCT of the Deprexis program to treat depression in MS patients. Patients will be recruited in five specialized MS centers in Germany (Charité Berlin and University Medical Center Hamburg) and the US (Cedars Sinai Los Angeles, University of Missouri - Kansas City, and Penn State University). The investigators plan to enroll n=400 patients who will be randomly assigned to two different versions of Deprexis (either Deprexis alone or Deprexis plus regular Email support, DeprexisPlus) for 3 months or a waitlist control group and undergo clinical assessments at baseline and month 3. In addition, the investigators will conduct long-term online follow up at month 6 and month 12.