diff --git a/appinfo/info.xml b/appinfo/info.xml
index 2f0176413f64a84463b2073bccf8e545ea39514b..9d09538766be74913df3180066be38c7308d34d2 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -10,7 +10,7 @@
     <description><![CDATA[in /e/OS cloud, nextcloud accounts are linked to mail accounts. This app ensures both are coordinated: it sets the e-mail address, quota and storage of the user upon creation.
     It also completes the account deletion by cleaning other parts of the /e/OS cloud setup to ensure no more data is retained when a user requests an account deletion.
     This app uses the UserDeletedEvent to invoke scripts in the docker-welcome container of /e/OS cloud setup]]></description>
-    <version>6.0.2</version>
+    <version>6.0.3</version>
     <licence>agpl</licence>
     <author mail="dev@murena.com" homepage="https://murena.com/">Murena SAS</author>
     <namespace>EcloudAccounts</namespace>
diff --git a/lib/Service/UserService.php b/lib/Service/UserService.php
index 0101604bda418fb66fc01b97ca9c9b83c2973d64..ecf5bddd7c0d1454c0fcc53447e927a1be5586fc 100644
--- a/lib/Service/UserService.php
+++ b/lib/Service/UserService.php
@@ -287,8 +287,15 @@ class UserService {
 	public function isBlacklistedEmail(string $email): bool {
 		// Get the blacklisted domains from configuration
 		$blacklistedDomainsInJson = $this->config->getAppValue(Application::APP_ID, 'blacklisted_domains');
+		if (empty($blacklistedDomainsInJson)) {
+			return false;
+		}
 		$blacklistedDomains = json_decode($blacklistedDomainsInJson, true);
-		
+
+		if (empty($blacklistedDomains)) {
+			return false;
+		}
+
 		// Split the email address into parts using explode
 		$emailParts = explode('@', $email);