ptalk-8.x-0.x-dev/modules/email_notification/config/install/ptalk_email_notification.settings.yml

ptalk_email_notification_default: true
ptalk_email_notification:
  body: "Hi [user:display-name].\n\nThis is an automatic reminder from the site [site:name]. You have received a new private message from [ptalk_message:author].\n\nTo read your message, follow this link:\n[ptalk_message:url]\n\nIf you don't want to receive this email again, change your preferences here:\n[user:edit-url]"
  subject: 'New private message at [site:name]'