diff --git a/src/MDBlockedMailserverSet.php b/src/MDBlockedMailserverSet.php
index 7ac2c54..132f593 100644
--- a/src/MDBlockedMailserverSet.php
+++ b/src/MDBlockedMailserverSet.php
@@ -14,6 +14,7 @@ declare(strict_types = 1);
 final class MDBlockedMailserverSet extends MDValueSet {
 
     const BLOCKED_DOMAINS = [
+        "@magenta.de",
         "@t-online.de",
     ];