outbound mails go to spam (gmail)

Hi,
I don't know what to do. I was installed exim, dmarc and still it's happen?
how I can to fix this problem?

It's better that you place your email adres or domain name so we can check things.
Only stating that you use exim and dmarc does not explain anything.
Also, it might be interesting which exim.pl version, which exim.conf version and which exim version you are using.

Next to that, check your logs, often what is displayed in there as spam reason might explain something.