'primary_key' => { label => 'Database primary key' },
;
-tie my %postfix_transport_map,
+tie my %postfix_transport_map, 'Tie::IxHash',
'domain' => 'domain'
;
my $postfix_transport_map =
join('\n', map "$_ $postfix_transport_map{$_}",
keys %postfix_transport_map );
-tie my %postfix_transport_static,
+tie my %postfix_transport_static, 'Tie::IxHash',
'transport' => 'virtual:',
;
my $postfix_transport_static =