diff --git a/dovecot/config_info.pl b/dovecot/config_info.pl
new file mode 100644
index 000000000..0eb2470c5
--- /dev/null
+++ b/dovecot/config_info.pl
@@ -0,0 +1,16 @@
+require 'dovecot-lib.pl';
+
+# config_post_save(&newconfig, &oldconfig)
+# Called after the module's configuration has been saved
+sub config_post_save
+{
+my ($newconfig, $oldconfig) = @_;
+my $f = $newconfig->{'add_config'};
+$f =~ s/^\s+|\s+$//g;
+if ($f && $f =~ /^\// && !-r $f && !-e $f && !-l $f) {
+	&open_lock_tempfile(ADDCONF, ">$f");
+	&close_tempfile(ADDCONF);
+	}
+}
+
+1;