If mail for colonel.com.pl must be delivered at Google (primary MX) and not at your Postfix server,
- Do not list colonel.com.pl in mydestination - Do not list colonel.com.pl in virtual_alias_domains - Do not list colonel.com.pl in virtual_mailbox_domains - Do not list colonel.com.pl in transport_maps In fact, there is no need to configure anything for colonel.com.pl at your Postfix server. Wietse