Windows FIPS mode blocks the use of older, weaker encryption algorithms (like MD5 or specific implementations of SSL/TLS 1.0) that are often still present in legacy configurations or required by the .NET framework for specific functions. MDaemon Webmail relies on OpenSSL or Windows crypto libraries for HTTPS. If FIPS is enforced at the OS level, it can block the web server from starting the encryption handshake if the certificates or protocols are not strictly FIPS-approved.
This is your first line of defense. If an IP address attempts to log in to Webmail and fails multiple times within a short window, MDaemon will: Temporarily ban the IP. Log the event for administrator review. mdaemon webmail fip