diff --git a/app/interactions/actions/contact_create.rb b/app/interactions/actions/contact_create.rb
index 8c6cb2282..ad5612322 100644
--- a/app/interactions/actions/contact_create.rb
+++ b/app/interactions/actions/contact_create.rb
@@ -12,9 +12,26 @@ module Actions
       maybe_remove_address
       maybe_attach_legal_doc
       validate_ident
+      maybe_change_email
       commit
     end
 
+    def maybe_change_email
+      return if Rails.env.test?
+
+      [:regex, :mx].each do |m|
+        r = Actions::SimpleMailValidator.run(email: contact.email, level: m)
+
+        unless r.success
+          contact.add_epp_error('2005', nil, r.errors, I18n.t(:parameter_value_syntax_error))
+          @error = true
+          return
+        end
+      end
+
+      true
+    end
+
     def maybe_remove_address
       return if Contact.address_processing?
 
diff --git a/app/interactions/actions/contact_update.rb b/app/interactions/actions/contact_update.rb
index f66aae805..3f8cfe61e 100644
--- a/app/interactions/actions/contact_update.rb
+++ b/app/interactions/actions/contact_update.rb
@@ -15,9 +15,26 @@ module Actions
       maybe_update_statuses
       maybe_update_ident if ident.present?
       maybe_attach_legal_doc
+      maybe_change_email
       commit
     end
 
+    def maybe_change_email
+      return if Rails.env.test?
+
+      [:regex, :mx].each do |m|
+        r = Actions::SimpleMailValidator.run(email: @new_attributes[:email], level: m)
+
+        unless r.success
+          contact.add_epp_error('2005', nil, r.errors, I18n.t(:parameter_value_syntax_error))
+          @error = true
+          return
+        end
+      end
+
+      true
+    end
+
     def maybe_remove_address
       return if Contact.address_processing?
 
diff --git a/app/interactions/actions/simple_mail_validator.rb b/app/interactions/actions/simple_mail_validator.rb
new file mode 100644
index 000000000..b96c3db46
--- /dev/null
+++ b/app/interactions/actions/simple_mail_validator.rb
@@ -0,0 +1,9 @@
+module Actions
+  module SimpleMailValidator
+    extend self
+
+    def run(email:, level:)
+      Truemail.validate(email, with: level).result
+    end
+  end
+end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 2ef9a5b81..f80b14533 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -371,6 +371,7 @@ en:
   sim_error: 'SIM application error'
   internal_error: 'Internal error'
   client_side_status_editing_error: 'Parameter value policy error. Client-side object status management not supported'
+  parameter_value_syntax_error: 'Parameter value syntax error: '
 
   # DEPP
   activemodel: