DSP Robotics Support

Lately I've got few private message notification mails from dsprobotics.com with login link. I've never click a link in email to login but log in as normally through a saved link and checking the private message folder shows empty box. Is private messaging service broken or are these post just phishing for login credentials ?

While I can't really answer that definitively, I encourage you to keep doing the safer way. I can't remember, if there is a direct link in those email messages, because I too also only use my saved browser links.