Postfix on CentOS-6.2 evidently does not use upstart style configurations. The author evidently has no plans on altering Postfix's structure to accommodate upstart any time soon, if ever (http://tech.groups.yahoo.com/group/postfix-users/message/274670). Thus Postfix starts and stops using a sysvinit style script.

Nonetheless, I have an upstart configuration that I wish to be dependent upon Postfix start and stop events. Is anyone here aware of some straight forward way of accomplishing this?

I am considering placing initctl emit statements into the sPostfix script. Before I go down that rabbit hole I would like to know if there is any other way provided by CentOS handling startup and shutdown dependencies between the two forms of scripts.