diff --git a/app/models/validation_event.rb b/app/models/validation_event.rb
index 3011a1c9e..68983b793 100644
--- a/app/models/validation_event.rb
+++ b/app/models/validation_event.rb
@@ -6,13 +6,13 @@
 # For email_validation event kind also check_level (regex/mx/smtp) is stored in the event_data
 class ValidationEvent < ApplicationRecord
   enum event_type: ValidationEvent::EventType::TYPES, _suffix: true
-  VALIDATION_PERIOD = 30.minutes.freeze
+  VALIDATION_PERIOD = 1.year.freeze
   VALID_CHECK_LEVELS = %w[regex mx smtp].freeze
   VALID_EVENTS_COUNT_THRESHOLD = 5
 
   INVALID_EVENTS_COUNT_BY_LEVEL = {
     regex: 1,
-    mx: 2,
+    mx: 3,
     smtp: 1,
   }.freeze