Doing everything according to the instructions in habrahabr.ru/blogs/sysadm/114852/
but to no avail
There is a web server, it revolves php, php sometimes does mailing lists.
Mailer exim 4.72, DNS records are created, the keys are registered, but when sending mail no dkim headers does not appear. The logs on the theme dkim empty (grep).
Send mail from command line echo-n "test" | mail -s "test" email@example.com