simplenews-3.0.0-alpha1/config/install/simplenews.settings.yml

hash_expiration: 86400

newsletter:
  issue_tokens: FALSE
  format: plain
  priority: 0
  receipt: TRUE

subscriber:
  sync_fields: TRUE

subscription:
  skip_verification: FALSE
  tidy_unconfirmed: 7
  confirm_subject: "Confirmation for [site:name]"
  confirm_body: "We have received a request to subscribe [simplenews-subscriber:mail] at [site:url]. To confirm please use the link below.\r\n\r\n[simplenews-subscriber:confirm-url]"
  validate_subject: "Manage your subscriptions at [site:name]"
  validate_body: "We have received a request to manage your subscriptions for [simplenews-subscriber:mail] at [site:url]. To proceed please use the link below.\r\n\r\n[simplenews-subscriber:manage-url]"
  confirm_subscribe_page: ""
  confirm_unsubscribe_page: ""

mail:
  use_cron: TRUE
  textalt: FALSE
  throttle: 20
  spool_progress_expiration: 3600
  spool_expire: 0
  debug: FALSE