diff --git a/README.md b/README.md
index 019c121..1371452 100644
--- a/README.md
+++ b/README.md
@@ -13,11 +13,11 @@ There are two types of roles with this module.
  * Website owner; (typically assigned to the Administrator group) ensures that a website is accurate and up-to-date, by delegating responsibility to content reviewers.
  * Content reviewer; responsible for keeping a website or part of a website accurate and up-to-date.
 
-## Requirements
+## Installation
 
- * Silverstripe ^4.0
- 
- **Note:** For Silverstripe 3.x, please use the [3.x release line](https://github.com/silverstripe/silverstripe-contentreview/tree/3).
+```sh
+composer require silverstripe/contentreview
+```
 
 ## Features
 
@@ -36,7 +36,7 @@ There are two types of roles with this module.
 ## Composer installation
 
 ```sh
-$ composer require silverstripe/contentreview
+composer require silverstripe/contentreview
 ```
 
 You'll also need to run `dev/build`.
diff --git a/composer.json b/composer.json
index 200d675..b7f8a37 100644
--- a/composer.json
+++ b/composer.json
@@ -49,4 +49,4 @@
     },
     "minimum-stability": "dev",
     "prefer-stable": true
-}
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index 4db29ed..af3b776 100644
--- a/package.json
+++ b/package.json
@@ -33,8 +33,8 @@
     "redux": "^4.2.0"
   },
   "devDependencies": {
-    "@silverstripe/eslint-config": "^1.0.0-alpha6",
-    "@silverstripe/webpack-config": "^2.0.0-alpha5",
+    "@silverstripe/eslint-config": "^1.0.0",
+    "@silverstripe/webpack-config": "^2.0.0",
     "webpack": "^5.74.0",
     "webpack-cli": "^5.0.0"
   },
diff --git a/src/Tasks/ContentReviewEmails.php b/src/Tasks/ContentReviewEmails.php
index c59bc56..2131796 100644
--- a/src/Tasks/ContentReviewEmails.php
+++ b/src/Tasks/ContentReviewEmails.php
@@ -3,6 +3,7 @@
 namespace SilverStripe\ContentReview\Tasks;
 
 use Page;
+use RuntimeException;
 use SilverStripe\ContentReview\Compatibility\ContentReviewCompatability;
 use SilverStripe\Control\Email\Email;
 use SilverStripe\Control\HTTPRequest;
@@ -15,18 +16,29 @@ use SilverStripe\Security\Member;
 use SilverStripe\SiteConfig\SiteConfig;
 use SilverStripe\View\ArrayData;
 use SilverStripe\View\SSViewer;
-use SilverStripe\ContentReview\Models\ContentReviewLog;
 
 /**
  * Daily task to send emails to the owners of content items when the review date rolls around.
  */
 class ContentReviewEmails extends BuildTask
 {
+    private array $invalid_emails = [];
+
     /**
      * @param HTTPRequest $request
+     * @throws RuntimeException
      */
     public function run($request)
     {
+        if (!$this->isValidEmail($senderEmail = SiteConfig::current_site_config()->ReviewFrom)) {
+            throw new RuntimeException(
+                sprintf(
+                    'Provided sender email address is invalid: "%s".',
+                    $senderEmail
+                )
+            );
+        }
+
         $compatibility = ContentReviewCompatability::start();
 
         // First grab all the pages with a custom setting
@@ -42,6 +54,16 @@ class ContentReviewEmails extends BuildTask
         }
 
         ContentReviewCompatability::done($compatibility);
+
+        if (is_array($this->invalid_emails) && count($this->invalid_emails) > 0) {
+            $plural = count($this->invalid_emails) > 1 ? 's are' : ' is';
+            throw new RuntimeException(
+                sprintf(
+                    'Provided email' . $plural . ' invalid: "%s".',
+                    implode(', ', $this->invalid_emails)
+                )
+            );
+        }
     }
 
     /**
@@ -93,6 +115,13 @@ class ContentReviewEmails extends BuildTask
         // Prepare variables
         $siteConfig = SiteConfig::current_site_config();
         $owner = Member::get()->byID($ownerID);
+
+        if (!$this->isValidEmail($owner->Email)) {
+            $this->invalid_emails[] = $owner->Name . ': ' . $owner->Email;
+
+            return;
+        }
+
         $templateVariables = $this->getTemplateVariables($owner, $siteConfig, $pages);
 
         // Build email
@@ -159,4 +188,12 @@ class ContentReviewEmails extends BuildTask
             'ToEmail' => $recipient->Email,
         ];
     }
+
+    /**
+     * Check validity of email
+     */
+    protected function isValidEmail(?string $email): bool
+    {
+        return (bool) filter_var($email, FILTER_VALIDATE_EMAIL);
+    }
 }
diff --git a/tests/php/ContentReviewNotificationTest.php b/tests/php/ContentReviewNotificationTest.php
index d2e7aca..241dd9c 100644
--- a/tests/php/ContentReviewNotificationTest.php
+++ b/tests/php/ContentReviewNotificationTest.php
@@ -3,6 +3,7 @@
 namespace SilverStripe\ContentReview\Tests;
 
 use Page;
+use ReflectionClass;
 use SilverStripe\CMS\Model\SiteTree;
 use SilverStripe\CMS\Controllers\CMSPageEditController;
 use SilverStripe\ContentReview\Extensions\ContentReviewCMSExtension;
@@ -132,6 +133,26 @@ class ContentReviewNotificationTest extends SapphireTest
         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();
+
+        $this->assertTrue($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
      *
diff --git a/yarn.lock b/yarn.lock
index ec0795a..b5ad5fa 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1261,10 +1261,10 @@
   resolved "https://registry.yarnpkg.com/@sect/modernizr-loader/-/modernizr-loader-1.0.3.tgz#7fd8cec372426c53f113f3cfd9344cb29e959825"
   integrity sha512-47zKwv4/1I0CYptZz8s4aSYSe0awmuyqa+HFKxN89/75h2q8hr6V752TZ9VjhGDhQ4gU0EU7Plew7b+7bf2crg==
 
-"@silverstripe/eslint-config@^1.0.0-alpha6":
-  version "1.0.0-alpha6"
-  resolved "https://registry.yarnpkg.com/@silverstripe/eslint-config/-/eslint-config-1.0.0-alpha6.tgz#1f243b003fddf3503a4abea37f35a8a5968cc96e"
-  integrity sha512-+P7UzhMRSmc7UlRYCiSXwjauLFYU11oBPwHl/bpacJ7xUcFY3Jt3CgcDt6d+XLvAJO8zMRsG9RcOm5MnxsyCsg==
+"@silverstripe/eslint-config@^1.0.0":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@silverstripe/eslint-config/-/eslint-config-1.0.0.tgz#dcf3f9cf2158bb587d8048a7c2860c0513221d40"
+  integrity sha512-pcHzB+6KWd8BPStBhHM8achdNY/Yj1p3WSTEs/CSw61VRcfBfg5GZECtvEerTSX/0ZeawAM1ABvstIAYihcfAg==
   dependencies:
     eslint "^8.26.0"
     eslint-config-airbnb "^19.0.4"
@@ -1274,10 +1274,10 @@
     eslint-plugin-react "^7.31.10"
     eslint-webpack-plugin "^3.2.0"
 
-"@silverstripe/webpack-config@^2.0.0-alpha5":
-  version "2.0.0-alpha8"
-  resolved "https://registry.yarnpkg.com/@silverstripe/webpack-config/-/webpack-config-2.0.0-alpha8.tgz#df97d047ceb0f1726cea7c18864ce15eba1361ce"
-  integrity sha512-aIwflLBdC2neS7zAq4qN+P2lhkb1vrxTVZSUILI7Gpthp/8tQ7k91W2UdXWWXOUytQYLo+5gBfkh4P60Mys/nQ==
+"@silverstripe/webpack-config@^2.0.0":
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/@silverstripe/webpack-config/-/webpack-config-2.0.0.tgz#278a72a1adbc6fa2362497d60424c78fba58e8e1"
+  integrity sha512-m1qGRxlsdhWL567cWe7IZNBUCzeyg3T1Y9yY9Y6XClwAqlg1oIO9uLfvfauA4dbtECrzU5n1AkaaU6kMRtN6Aw==
   dependencies:
     "@babel/core" "^7.19.6"
     "@babel/preset-env" "^7.19.4"