Hi, Here is my situation on which I could use some advice. I have 2 ISPConfig servers working together: isp1: Web, DB isp2: Mail I used the tutorial: The Perfect Server - Ubuntu 20.04 with Apache, PHP,MariaDB, PureFTPD, BIND, Postfix, Dovecot and ISPConfig 3.2 (Beta). But instead of the beta version i used the stable version. Everything works as it should but forgot to think about something that I'm not sure how to handle. I have different forms on different website on isp1 that sends email. Of course it doesn't send any, they have no configuration to send emails. How can I configure my isp1 server so that it uses my isp2 since its configured as email server? FYI, isp1 has a postfix server that is disabled since I used the tutorial to install both servers the same way but only using the services I needed. Thank in advance guys.