message is not signed with DKIM

[partomas]

I did a Test the Spammyness of Emails by https://www.mail-tester.com/

And get one of errors, that "Your message is not signed with DKIM", so might anyone know what I must to do in CRM to fix that? I'm sending mails by using servers localhost.

[partomas]

There are sample code how to add DKIM Sigma turės to outgoing mail https://www.example-code.com/phpext/...imSigned_b.asp
but how to implement this in Espo CRM?