Hello everyone, what I want to do is to get support on how I can set up the following structure. Setting up mail gateway with Proxmox, using spamassassian with Plesk behind it. Using Roundcube, postfix and dovecot in Plesk panel. When I performed the relay operation on the Plesk panel, the e-mail service did not work. If there is a document you can recommend on this subject, I can search it there. Thank you.