I have a website that sends emails from a php application. Previously i had exim4 for sending emails but started having all emails marked as spam.
Your task is to set up and configure Postfix using Google Apps smtp relay with all necessary steps to avoid emails going to spam.
Mail in the domain is handled by Google Apps, so there are no actual mailboxes on the server.
God experience with Mail / Spam / Postfix and Linux is required.
Please keep a record of all steps you take (1-2-3) in google apps and on the server (including SSH commands) so that I can reproduce the installation. I need to keep record of changes done on my server.
Server on Digitalocean: Ubuntu 18.04 / Apache 2.4.29 / PHP 5.6
Please PM me your suggestions on what needs to be done in your opinion, I need to see if you ever had this done and understand the task.