I´m relatively new to server setup. I followed the guide on: https://www.howtoforge.com/tutorial...l-pureftpd-bind-postfix-doveot-and-ispconfig/ I´m using Google Cloud Compute Engine for the VM instances. Got everything to work fine. Except the part on the e-mail servers and account. I changed the SMTP setup to port 2525, since I found out that Google blocks the port 25. The main problem is when I try to send e-mails through the test account. It show the message box "sending message..." but it never goes on. And doesn´t show any other error messages. Here´s the print screen of this part: Anyone went through a similar problem? Or is it really impossible to set up a mail server with Google Cloud Platform infrastructure? Other tutorial to build e-mail servers using Google Cloud are also accepted. Here´s my Google Cloud Firewall Configuration: On ISPConfig, monitor -> server state, shows that SMTP-Server is offline. I´ve executed /etc/init.d/postfix restart in the terminal but that doesn´t seem to be it. Here are some print screens on some of the logs on ISPConfig: Has anyone ran into this problem and has a solution for it? Thanks in advance.