Send different Devise mail for re-confirmations

app/mailers/devise/mailer.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+if defined?(ActionMailer)
+  class Devise::Mailer < Devise.parent_mailer.constantize
+    include Devise::Mailers::Helpers
+
+    def confirmation_instructions(record, token, opts = {})
+      @token = token
+      if record.pending_reconfirmation?
+        devise_mail(record, :reconfirmation_instructions, opts)
+      else
+        devise_mail(record, :confirmation_instructions, opts)
+      end
+    end
+
+    def reset_password_instructions(record, token, opts = {})
+      @token = token
+      devise_mail(record, :reset_password_instructions, opts)
+    end
+
+    def unlock_instructions(record, token, opts = {})
+      @token = token
+      devise_mail(record, :unlock_instructions, opts)
+    end
+
+    def email_changed(record, opts = {})
+      devise_mail(record, :email_changed, opts)
+    end
+
+    def password_change(record, opts = {})
+      devise_mail(record, :password_change, opts)
+    end
+  end
+end

app/views/devise/mailer/reconfirmation_instructions.html.erb

@@ -0,0 +1,5 @@
+<p>Hello <%= @resource.cn %>,</p>
+
+<p>Please confirm your new email address through the link below:</p>
+
+<p><%= link_to 'Confirm my address', confirmation_url(@resource, confirmation_token: @token) %></p>