@MR.S Hello, thanks for your help to figure it out. I have changed the direction like above: so: Waited a minute and still can send mails... What have I missed?

@MR.S Hello! Thanks for the reply! I know that rules sequence is important. But currently I lost in the fist step, how to block any IP (lan, wifi) on the network using 25 port for WAN OUTgoing...

Hello! How can I set Gateway ACL to block outgoing SMTP traffic on the network (LAN, Wireless) expect the mail server with dedicated IP connected to gateways LAN port directly? As first to understand...