I use the free version of Newsletter Plugin and I need to set up SMTP settings. I have read your documentation but I can’t understand where is the field for DKIM setup.
Many emails from my first newsletter sent to subscribers’ spam folder and try to understand what is the problem. I have read this page (https://www.thenewsletterplugin.com/emails-end-spam-folder) but can’t go further.
We do not support dkim in the plugin, you should ask the SMTP provider to sign the email using dkim. You should even ask the provider to setup the SPF records which is an easies task.