diff --git a/app/jobs/validate_dnssec_job.rb b/app/jobs/validate_dnssec_job.rb
index 1f418e43c..3292f505d 100644
--- a/app/jobs/validate_dnssec_job.rb
+++ b/app/jobs/validate_dnssec_job.rb
@@ -28,10 +28,23 @@ class ValidateDnssecJob < ApplicationJob
     domain.nameservers.each do |n|
       validate(hostname: n.hostname, domain: domain)
 
+      notify_contacts(domain)
       logger.info "----------------------------"
     end
   end
 
+  def notify_contacts(domain)
+    flag = domain.dnskeys.any? { |k| k.validation_datetime.present? }
+
+    return if flag
+
+    text = "DNSKEYS for #{domain.name} are invalid!"
+    logger.info text
+    ContactNotification.notify_registrar(domain: domain, text: text)
+    ContactNotification.notify_tech_contact(domain: domain)
+
+  end
+
   def validate(hostname:, domain:,  type: 'DNSKEY', klass: 'IN')
     resolver = prepare_validator(hostname)
     answer = resolver.query(domain.name, type, klass)
@@ -51,16 +64,21 @@ class ValidateDnssecJob < ApplicationJob
 
   def compare_dnssec_data(response_container:, domain:)
     domain.dnskeys.each do |key|
-      next unless key.flags.to_s == '257'
+      next unless key.flags.to_s == '257' || key.validation_datetime.nil?
 
       flag = make_magic(response_container: response_container, dnskey: key)
       text = "#{key.flags} - #{key.protocol} - #{key.alg} - #{key.public_key}"
       if flag
+        key.validation_datetime = Time.zone.now
+        key.save
+
         logger.info text + " ------->> succesfully!"
       else
         logger.info text + " ------->> not found in zone!"
       end
     end
+
+
   end
 
   def make_magic(response_container:, dnskey:)
diff --git a/app/mailers/contact_inform_mailer.rb b/app/mailers/contact_inform_mailer.rb
new file mode 100644
index 000000000..5c6f28f2c
--- /dev/null
+++ b/app/mailers/contact_inform_mailer.rb
@@ -0,0 +1,16 @@
+class ContactInformMailer < ApplicationMailer
+  helper_method :address_processing
+
+  def notify(contact:, subject:)
+    @contact = email
+    @subject = subject
+
+    mail(to: contact.email, subject: subject)
+  end
+
+  private
+
+  def address_processing
+    Contact.address_processing?
+  end
+end
diff --git a/app/services/contact_notification.rb b/app/services/contact_notification.rb
new file mode 100644
index 000000000..c5e8a7b0c
--- /dev/null
+++ b/app/services/contact_notification.rb
@@ -0,0 +1,17 @@
+module ContactNotification
+  extend self
+
+  def notify_registrar(domain:, text:)
+    domain.registrar.notifications.create(text: text)
+  end
+
+  def notify_tech_contact(domain:)
+    text = "DNSKEYS for #{domain.name} are invalid!"
+    domain.tech_domain_contacts.each do |tech|
+      contact = Contact.find(tech.id)
+
+      ContactInformMailer.notify(contact: contact, subject: text)
+    end
+  end
+
+end
diff --git a/app/views/mailers/contact_inform_mailer/notify.html.erb b/app/views/mailers/contact_inform_mailer/notify.html.erb
new file mode 100644
index 000000000..224584706
--- /dev/null
+++ b/app/views/mailers/contact_inform_mailer/notify.html.erb
@@ -0,0 +1 @@
+<p>DNSKEYS for <%= @domain.name %> are invalid!</p>
diff --git a/app/views/mailers/contact_inform_mailer/notify.text.erb b/app/views/mailers/contact_inform_mailer/notify.text.erb
new file mode 100644
index 000000000..224584706
--- /dev/null
+++ b/app/views/mailers/contact_inform_mailer/notify.text.erb
@@ -0,0 +1 @@
+<p>DNSKEYS for <%= @domain.name %> are invalid!</p>