diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index d6652492e..4f340a3f8 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -3,19 +3,6 @@ class ApplicationMailer < ActionMailer::Base
   default from: 'noreply@internet.ee'
   layout 'mailer'
 
-  def whitelist_blocked?(emails)
-    return false if Rails.env.production? || Rails.env.test?
-
-    emails = [emails] unless emails.is_a?(Array)
-    emails = emails.flatten
-    emails.each do |email|
-      next if TEST_EMAILS.include?(email)
-      logger.info "EMAIL SENDING WAS BLOCKED BY WHITELIST: #{email}"
-      return true
-    end
-    false
-  end
-
   # turn on delivery on specific (epp) request only, thus rake tasks does not deliver anything
   def delivery_off?(model, deliver_emails = false)
     return false if deliver_emails == true
diff --git a/app/mailers/contact_mailer.rb b/app/mailers/contact_mailer.rb
index 308bdd827..a036f8bef 100644
--- a/app/mailers/contact_mailer.rb
+++ b/app/mailers/contact_mailer.rb
@@ -13,7 +13,6 @@ class ContactMailer < ApplicationMailer
 
     return unless email || @contact
     return if delivery_off?(@contact, should_deliver)
-    return if whitelist_blocked?(email)
 
     begin
       mail(to: format(email), subject: "#{I18n.t(:contact_email_update_subject)} [#{@contact.code}]")
diff --git a/app/mailers/domain_mailer.rb b/app/mailers/domain_mailer.rb
index d92e79ac0..7b508df0c 100644
--- a/app/mailers/domain_mailer.rb
+++ b/app/mailers/domain_mailer.rb
@@ -17,7 +17,6 @@ class DomainMailer < ApplicationMailer
       return
     end
 
-    return if whitelist_blocked?(@domain.registrant.email)
     mail(to: format(@domain.registrant.email),
          subject: "#{I18n.t(:pending_delete_rejected_notification_subject,
          name: @domain.name)} [#{@domain.name}]")
@@ -29,7 +28,6 @@ class DomainMailer < ApplicationMailer
     return if delivery_off?(@domain, should_deliver)
     # no delivery off control, driggered by cron, no epp request
 
-    return if whitelist_blocked?(@domain.registrant.email)
     mail(to: format(@domain.registrant.email),
          subject: "#{I18n.t(:pending_delete_expired_notification_subject,
          name: @domain.name)} [#{@domain.name}]")
@@ -40,7 +38,6 @@ class DomainMailer < ApplicationMailer
     return unless @domain
     return if delivery_off?(@domain, should_deliver)
 
-    return if whitelist_blocked?(@domain.registrant.email)
     mail(to: format(@domain.registrant.email),
          subject: "#{I18n.t(:delete_confirmation_subject,
          name: @domain.name)} [#{@domain.name}]")
diff --git a/app/mailers/invoice_mailer.rb b/app/mailers/invoice_mailer.rb
index 74821c25a..13a0007bc 100644
--- a/app/mailers/invoice_mailer.rb
+++ b/app/mailers/invoice_mailer.rb
@@ -5,7 +5,6 @@ class InvoiceMailer < ApplicationMailer
     @invoice = Invoice.find_by(id: invoice_id)
     billing_email ||= @invoice.billing_email
     return unless @invoice
-    return if whitelist_blocked?(billing_email)
 
     kit = PDFKit.new(html)
     pdf = kit.to_pdf
diff --git a/config/application-example.yml b/config/application-example.yml
index d3737ca83..9cbcadbb6 100644
--- a/config/application-example.yml
+++ b/config/application-example.yml
@@ -22,13 +22,6 @@ smtp_enable_starttls_auto: 'true' # 'false'
 # If your mail server requires authentication, please change.
 smtp_authentication: 'plain' # 'plain', 'login', 'cram_md5'
 registrant_url: 'https://registrant.example.com' # for valid email body registrant links
-# Staging env does not send any emails unless they are whitelisted
-whitelist_emails_for_staging: >
-  test@example.org,
-  old@example.org,
-  new@example.org,
-  old@example.com,
-  new@example.com
 
 #
 # ADMIN server
diff --git a/config/initializers/settings.rb b/config/initializers/settings.rb
deleted file mode 100644
index eaaa12406..000000000
--- a/config/initializers/settings.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-TEST_EMAILS =
-  if Rails.env.test?
-    %w(
-      test@example.com
-      test@example.org
-      old@example.org
-      new@example.org
-      old@example.com
-      new@example.com
-    )
-  else
-    ENV['whitelist_emails_for_staging'] ||= ''
-    ENV['whitelist_emails_for_staging'].to_s.split(',').map(&:strip)
-  end