Externalize role

templates/etc/dovecot/conf.d/auth-master.conf.ext.j2

@@ -0,0 +1,16 @@
+# Authentication for master users. Included from 10-auth.conf.
+
+# By adding master=yes setting inside a passdb you make the passdb a list
+# of "master users", who can log in as anyone else.
+# <doc/wiki/Authentication.MasterUsers.txt>
+
+# Example master user passdb using passwd-file. You can use any passdb though.
+passdb {
+  driver = passwd-file
+  master = yes
+  args = /etc/dovecot/master-users
+
+  # Unless you're using PAM, you probably still want the destination user to
+  # be looked up from passdb that it really exists. pass=yes does that.
+  pass = yes
+}