Rescue contact registrant change email delivery #2745

app/mailers/application_mailer.rb

@@ -1,4 +1,25 @@
 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 unless TEST_EMAILS.include?(email)
+      logger.warn "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)
+    return false if model.deliver_emails == true
+    logger.warn "EMAIL SENDING WAS NOT ACTIVATED " \
+      "BY MODEL OBJECT: id ##{model.try(:id)} deliver_emails returned false"
+    true
+  end
 end

app/mailers/contact_mailer.rb

@@ -1,23 +1,34 @@
 class ContactMailer < ApplicationMailer
-  # rubocop: disable Metrics/CyclomaticComplexity
+  # rubocop:disable Metrics/MethodLength
   def email_updated(contact)
-    unless Rails.env.production?
-      return unless TEST_EMAILS.include?(contact.email) || TEST_EMAILS.include?(contact.email_was)
-    end
-
-    # turn on delivery on specific request only, thus rake tasks does not deliver anything
-    return if contact.deliver_emails != true
+    return if delivery_off?(contact)
 
     @contact = contact
-
     emails = []
     emails << [@contact.email, @contact.email_was] if @contact.registrant_domains.present?
     emails << @contact.domains.map(&:registrant_email) if @contact.domains.present?
     emails = emails.uniq
-    
+
+    return if whitelist_blocked?(emails)
     emails.each do |email|
-      mail(to: email, subject: "#{I18n.t(:contact_email_update_subject)} [#{@contact.code}]")
+      begin
+        mail(to: email, subject: "#{I18n.t(:contact_email_update_subject)} [#{@contact.code}]")
+      rescue EOFError,
+             IOError,
+             TimeoutError,
+             Errno::ECONNRESET,
+             Errno::ECONNABORTED,
+             Errno::EPIPE,
+             Errno::ETIMEDOUT,
+             Net::SMTPAuthenticationError,
+             Net::SMTPServerBusy,
+             Net::SMTPFatalError,
+             Net::SMTPSyntaxError,
+             Net::SMTPUnknownError,
+             OpenSSL::SSL::SSLError => e
+        logger.warn "EMAIL SENDING FAILED: #{email}: #{e}"
+      end
     end
   end
-  # rubocop: enable Metrics/CyclomaticComplexity
+  # rubocop:enable Metrics/MethodLength
 end

app/mailers/domain_mailer.rb

@@ -1,10 +1,7 @@
 class DomainMailer < ApplicationMailer
   def registrant_pending_updated(domain)
     @domain = domain
-    return if Rails.env.production? ? false : !TEST_EMAILS.include?(@domain.registrant_email)
-
-    # turn on delivery on specific EPP request only, thus rake tasks does not deliver anything
-    return if @domain.deliver_emails != true
+    return if delivery_off?(@domain)
 
     if @domain.registrant_verification_token.blank?
       logger.warn "EMAIL NOT DELIVERED: registrant_verification_token is missing for #{@domain.name}"
@@ -21,27 +18,23 @@ class DomainMailer < ApplicationMailer
     confirm_path = "#{ENV['registrant_url']}/registrant/domain_update_confirms"
     @verification_url = "#{confirm_path}/#{@domain.id}?token=#{@domain.registrant_verification_token}"
 
+    return if whitelist_blocked?(@old_registrant.email)
     mail(to: @old_registrant.email,
          subject: "#{I18n.t(:domain_registrant_pending_updated_subject, name: @domain.name)} [#{@domain.name}]")
   end
 
   def registrant_updated(domain)
     @domain = domain
-    return if Rails.env.production? ? false : !TEST_EMAILS.include?(@domain.registrant_email)
-
-    # turn on delivery on specific EPP request only, thus rake tasks does not deliver anything
-    return if @domain.deliver_emails != true
+    return if delivery_off?(@domain)
 
+    return if whitelist_blocked?(@domain.registrant_email)
     mail(to: @domain.registrant_email,
          subject: "#{I18n.t(:domain_registrant_updated, name: @domain.name)} [#{@domain.name}]")
   end
 
   def pending_deleted(domain)
     @domain = domain
-    return if Rails.env.production? ? false : !TEST_EMAILS.include?(@domain.registrant_email)
-
-    # turn on delivery on specific EPP request only, thus rake tasks does not deliver anything
-    return if @domain.deliver_emails != true
+    return if delivery_off?(@domain)
 
     if @domain.registrant_verification_token.blank?
       logger.warn "EMAIL NOT DELIVERED: registrant_verification_token is missing for #{@domain.name}"
@@ -58,6 +51,7 @@ class DomainMailer < ApplicationMailer
     confirm_path = "#{ENV['registrant_url']}/registrant/domain_delete_confirms"
     @verification_url = "#{confirm_path}/#{@domain.id}?token=#{@domain.registrant_verification_token}"
 
+    return if whitelist_blocked?(@old_registrant.email)
     mail(to: @old_registrant.email,
          subject: "#{I18n.t(:domain_pending_deleted_subject, name: @domain.name)} [#{@domain.name}]")
   end

app/mailers/invoice_mailer.rb

@@ -1,6 +1,6 @@
 class InvoiceMailer < ApplicationMailer
   def invoice_email(invoice, pdf)
-    return if Rails.env.production? ? false : !TEST_EMAILS.include?(invoice.billing_email)
+    return if whitelist_blocked?(invoice.billing_email)
 
     @invoice = invoice
     attachments[invoice.pdf_name] = pdf