diff --git a/src/Tasks/ContentReviewEmails.php b/src/Tasks/ContentReviewEmails.php
index 86414a7..d1ea47d 100644
--- a/src/Tasks/ContentReviewEmails.php
+++ b/src/Tasks/ContentReviewEmails.php
@@ -8,7 +8,6 @@
 use SilverStripe\Dev\BuildTask;
 use SilverStripe\PolyExecution\PolyOutput;
 use SilverStripe\Model\List\ArrayList;
-use SilverStripe\Dev\Deprecation;
 use SilverStripe\ORM\FieldType\DBDatetime;
 use SilverStripe\ORM\FieldType\DBField;
 use SilverStripe\Model\List\SS_List;
@@ -34,7 +33,7 @@ class ContentReviewEmails extends BuildTask
     protected function execute(InputInterface $input, PolyOutput $output): int
     {
         $senderEmail = SiteConfig::current_site_config()->ReviewFrom;
-        if (!Deprecation::withSuppressedNotice(fn() => $this->isValidEmail($senderEmail))) {
+        if (!Email::is_valid_address($senderEmail)) {
             $output->writeln(
                 sprintf(
                     '<error>Provided sender email address is invalid: "%s".</>',
@@ -124,7 +123,7 @@ protected function notifyOwner($ownerID, SS_List $pages)
         $siteConfig = SiteConfig::current_site_config();
         $owner = Member::get()->byID($ownerID);
 
-        if (!Deprecation::withSuppressedNotice(fn() => $this->isValidEmail($owner->Email))) {
+        if (!Email::is_valid_address($owner->Email)) {
             $this->invalid_emails[] = $owner->Name . ': ' . $owner->Email;
 
             return;
@@ -196,14 +195,4 @@ protected function getTemplateVariables($recipient, $config, $pages)
             'ToEmail' => $recipient->Email,
         ];
     }
-
-    /**
-     * Check validity of email
-     * @deprecated 5.4.0 Use SilverStripe\Control\Email\Email::is_valid_address() instead.
-     */
-    protected function isValidEmail(?string $email): bool
-    {
-        Deprecation::notice('5.4.0', 'Use ' . Email::class . '::is_valid_address() instead.');
-        return (bool) filter_var($email, FILTER_VALIDATE_EMAIL);
-    }
 }
diff --git a/tests/php/ContentReviewNotificationTest.php b/tests/php/ContentReviewNotificationTest.php
index 8fd1216..9a4a49e 100644
--- a/tests/php/ContentReviewNotificationTest.php
+++ b/tests/php/ContentReviewNotificationTest.php
@@ -12,7 +12,6 @@
 use SilverStripe\ContentReview\Extensions\SiteTreeContentReview;
 use SilverStripe\ContentReview\Tasks\ContentReviewEmails;
 use SilverStripe\Control\HTTPRequest;
-use SilverStripe\Dev\Deprecation;
 use SilverStripe\Dev\SapphireTest;
 use SilverStripe\ORM\FieldType\DBDatetime;
 use SilverStripe\Security\Group;
@@ -145,28 +144,6 @@ public function testContentReviewNeeded()
         DBDatetime::clear_mock_now();
     }
 
-    /**
-     * Test that provided email is valid
-     */
-    public function testIsValidEmail()
-    {
-        $class = new ReflectionClass(ContentReviewEmails::class);
-        $method = $class->getMethod('isValidEmail');
-        $method->setAccessible(true);
-
-        $member = $this->objFromFixture(Member::class, 'author');
-        $task = new ContentReviewEmails();
-
-        Deprecation::withSuppressedNotice(function () use ($method, $task, $member) {
-            $this->assertTrue($method->invokeArgs($task, [$member->Email]));
-            $this->assertTrue($method->invokeArgs($task, ['correct.email@example.com']));
-
-            $this->assertFalse($method->invokeArgs($task, [null]));
-            $this->assertFalse($method->invokeArgs($task, ['broken.email']));
-            $this->assertFalse($method->invokeArgs($task, ['broken@email']));
-        });
-    }
-
     /**
      * Deletes all pages except those passes in to the $ids parameter
      *