diff --git a/app/jobs/verify_emails_job.rb b/app/jobs/verify_emails_job.rb
index a0d7234c5..41965c9d9 100644
--- a/app/jobs/verify_emails_job.rb
+++ b/app/jobs/verify_emails_job.rb
@@ -2,10 +2,7 @@ class VerifyEmailsJob < Que::Job
   def run(verification_id)
     email_address_verification = run_condition(EmailAddressVerification.find(verification_id))
 
-    if email_address_verification.recently_verified?
-      destroy
-      return
-    end
+    return if email_address_verification.recently_verified?
 
     ActiveRecord::Base.transaction do
       email_address_verification.verify
diff --git a/app/models/concerns/email_verifable.rb b/app/models/concerns/email_verifable.rb
index de8041c32..f7c9e59fb 100644
--- a/app/models/concerns/email_verifable.rb
+++ b/app/models/concerns/email_verifable.rb
@@ -3,15 +3,15 @@ module Concerns
     extend ActiveSupport::Concern
 
     def email_verification
-      EmailAddressVerification.find_or_create_by(email: email,
-                                                 domain: domain(email))
+      EmailAddressVerification.find_or_create_by(email: email.downcase,
+                                                 domain: domain(email.downcase))
     end
 
     def billing_email_verification
       return unless attribute_names.include?('billing_email')
 
-      EmailAddressVerification.find_or_create_by(email: billing_email,
-                                                 domain: domain(email))
+      EmailAddressVerification.find_or_create_by(email: billing_email.downcase,
+                                                 domain: domain(email.downcase))
     end
 
     def domain(email)
diff --git a/config/schedule.rb b/config/schedule.rb
index 089ce93f9..7ebf97d12 100644
--- a/config/schedule.rb
+++ b/config/schedule.rb
@@ -62,6 +62,10 @@ if @cron_group == 'registry'
     rake 'domain:discard'
   end
 
+  every 10.minutes do
+    rake 'verify_email:all_domains'
+  end
+
   # Should be at least once every 4 days, since according to LHV specs:
   # "Unread messages older than 5 days are automatically scheduled for deletion"
   # https://partners.lhv.ee/en/connect/#messaging
diff --git a/db/migrate/20200610090110_change_email_verification_fields_to_citext.rb b/db/migrate/20200610090110_change_email_verification_fields_to_citext.rb
new file mode 100644
index 000000000..a7e2f8ee8
--- /dev/null
+++ b/db/migrate/20200610090110_change_email_verification_fields_to_citext.rb
@@ -0,0 +1,13 @@
+class ChangeEmailVerificationFieldsToCitext < ActiveRecord::Migration[6.0]
+  def up
+    enable_extension 'citext'
+    change_column :email_address_verifications, :email, :citext
+    change_column :email_address_verifications, :domain, :citext
+  end
+
+  def down
+    change_column :email_address_verifications, :email, :string
+    change_column :email_address_verifications, :domain, :string
+    disable_extension 'citext'
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index c5ad902b7..9db7d07d1 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -33,10 +33,17 @@ CREATE EXTENSION IF NOT EXISTS btree_gist WITH SCHEMA public;
 
 
 --
--- Name: EXTENSION btree_gist; Type: COMMENT; Schema: -; Owner: -
+-- Name: citext; Type: EXTENSION; Schema: -; Owner: -
 --
 
-COMMENT ON EXTENSION btree_gist IS 'support for indexing common datatypes in GiST';
+CREATE EXTENSION IF NOT EXISTS citext WITH SCHEMA public;
+
+
+--
+-- Name: EXTENSION citext; Type: COMMENT; Schema: -; Owner: -
+--
+
+COMMENT ON EXTENSION citext IS 'data type for case-insensitive character strings';
 
 
 --
@@ -822,10 +829,10 @@ ALTER SEQUENCE public.domains_id_seq OWNED BY public.domains.id;
 
 CREATE TABLE public.email_address_verifications (
     id bigint NOT NULL,
-    email character varying NOT NULL,
+    email public.citext NOT NULL,
     verified_at timestamp without time zone,
     success boolean DEFAULT false NOT NULL,
-    domain character varying NOT NULL
+    domain public.citext NOT NULL
 );
 
 
@@ -4700,5 +4707,6 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20200518104105'),
 ('20200529115011'),
 ('20200605100827'),
+('20200610090110'),
 ('20200630081231');