Playing with mail MTA's, clients and other tools there is a question, where to put the spool directory. Usually on Linux it is /var/spool. postfix.tcz using /usr/local/var/spool directory. I'm fine with it, but would be good the standardize it across applications.
Question is valid not only for mail spool but more generic, as /var is used to store log files, different spools, PID's of running processes, web server roots, etc.
My vote is /var.
Please comment.