Sometime at the end of 2019 the links in emails (MacMail) no longer opened for me. I get 404 error message everytime. What is the problem here? I first thought it's Infusionsoft's update issue (they are tracking open rates for their clients) but now it's expanded to other links as well. I think it is my Mac rather than other softwares. Safari is 13.0.5. Catalina 10.15.3. Please help!