Igor Zinovik: > I'd like to ask how configuration directives are applied to > additional services that are specified in master.cf.
See http://www.postfix.org/master.5.html -o name=value Override the named main.cf configuration parameter. The parameter value can refer to other parameters as $name etc., just like in main.cf. See postconf(5) for syntax. See the manpage for the full text. Wietse
