I have a mac osx server at my office. I have only one email address configured on it because it's an email address outside my GSuite account. That email address was created for sending mails from a php script (I don't want to pay to Google for that email address because I don't need all of the Google Services on it). I configured PHP Mailer for sending mails using that email account.
It's connecting perfectly fine, authentication is correct, etc., but there is one problem: if I send mails to @mydomain.com it says that account doesn't exist, but it does exist, only that it is hosted on GSuite. If I send mails outside mydomain, it works fine.
Question is: how do I route those mails to look up for the correct MX récords? I mean, how to make those @mydomain.com emails reach the GSuite host?