I was wondering what most healthcare providers use for secure email between partners? Back when I was supporting Exchange 2003 we used to have secure site to site connections setup for email communication. Since Exchange 2010 they now have Mutual TLS, but I hear it can be difficult to setup. However our customer has a partner that wants us to setup Mutual TLS with them. Is it worth pursuing this, or is there a better way that would meet HIPAA compliance?
When I was in financial we used ZixMail, but this customer says they want to avoid having anything setup on the end user computer. Last I remember, ZixMail requires an application to be installed and configured.