How to set up local exim so that emails don't end up in spam?

Question

Debian

Actually a subject. I've never encountered setting up such agents.
I did the configuration according to these instructions lib.clodo.ru/email/exim_debian.html and https://debian.pro/276
I send it to Google mail both through the usual call to the php mail () function, and with the help of phpmailer. The letters are coming. But they end up in spam. I am attaching a screenshot of the source code of the incoming email
i.imgur.com/7gRyT50.png
PS this is my work computer, this is not hosting

Answer 1

Well, duck, he writes that the problem is in the SPF record ... Google how it is configured. At the same time fasten DKIM.