diff --git a/shared/lib/Mail/Object/MessagePropertiesBaseAbstract.php b/shared/lib/Mail/Object/MessagePropertiesBaseAbstract.php
index 624d54a..95e4d9f 100644
--- a/shared/lib/Mail/Object/MessagePropertiesBaseAbstract.php
+++ b/shared/lib/Mail/Object/MessagePropertiesBaseAbstract.php
@@ -282,7 +282,7 @@ abstract class MessagePropertiesBaseAbstract extends NodePropertiesBaseAbstract
      */
     public function getFlags(): array {
         return $this->data[static::PROPERTY_FLAGS] ?? [
-            'read' => false,
+            'seen' => false,
             'starred' => false,
             'important' => false,
             'answered' => false,
diff --git a/shared/lib/Mail/Object/MessagePropertiesMutableAbstract.php b/shared/lib/Mail/Object/MessagePropertiesMutableAbstract.php
index e384d1b..7610fda 100644
--- a/shared/lib/Mail/Object/MessagePropertiesMutableAbstract.php
+++ b/shared/lib/Mail/Object/MessagePropertiesMutableAbstract.php
@@ -295,7 +295,7 @@ abstract class MessagePropertiesMutableAbstract extends MessagePropertiesBaseAbs
     public function setFlags(array $value): static {
         if (!isset($this->data[static::PROPERTY_FLAGS])) {
             $this->data[static::PROPERTY_FLAGS] = [
-                'read' => false,
+                'seen' => false,
                 'starred' => false,
                 'important' => false,
                 'answered' => false,
@@ -315,7 +315,7 @@ abstract class MessagePropertiesMutableAbstract extends MessagePropertiesBaseAbs
     public function setFlag(string $name, bool $value): static {
         if (!isset($this->data[static::PROPERTY_FLAGS])) {
             $this->data[static::PROPERTY_FLAGS] = [
-                'read' => false,
+                'seen' => false,
                 'starred' => false,
                 'important' => false,
                 'answered' => false,