Does anyone have OSSEC running on a Debian 10 server with ISPConfig? It looks like OSSEC needs sendmail while I am running postfix and postfix-mysql. Installing sendmail isn't a good idea as it will remove postfix, postfix-mysql which is required for running my mail server. Code: os_maild/sendmail.c:12:10: fatal error: event.h: No such file or directory #include <event.h> ^~~~~~~~~ compilation terminated. make: *** [Makefile:930: os_maild/sendmail.o] Error 1 Error 0x5. Building error. Unable to finish the installation.