diff --git a/src/Repository/MailMessageRepository.php b/src/Repository/MailMessageRepository.php
index bc4bef9..2d9cf0e 100644
--- a/src/Repository/MailMessageRepository.php
+++ b/src/Repository/MailMessageRepository.php
@@ -54,4 +54,49 @@ class MailMessageRepository extends ServiceEntityRepository
             ->getSingleScalarResult()
         ;
     }
+
+    public function findMaxUidInFolder(MailFolder $folder): int
+    {
+        $result = $this->createQueryBuilder('m')
+            ->select('MAX(m.uid)')
+            ->andWhere('m.folder = :folder')
+            ->setParameter('folder', $folder)
+            ->getQuery()
+            ->getSingleScalarResult()
+        ;
+
+        return (int) ($result ?? 0);
+    }
+
+    /**
+     * @return list<MailMessage>
+     */
+    public function findLastNByFolder(MailFolder $folder, int $limit): array
+    {
+        return $this->createQueryBuilder('m')
+            ->andWhere('m.folder = :folder')
+            ->setParameter('folder', $folder)
+            ->orderBy('m.sentAt', 'DESC')
+            ->addOrderBy('m.id', 'DESC')
+            ->setMaxResults($limit)
+            ->getQuery()
+            ->getResult()
+        ;
+    }
+
+    /**
+     * @return list<int>
+     */
+    public function findAllUidsByFolder(MailFolder $folder): array
+    {
+        $rows = $this->createQueryBuilder('m')
+            ->select('m.uid')
+            ->andWhere('m.folder = :folder')
+            ->setParameter('folder', $folder)
+            ->getQuery()
+            ->getArrayResult()
+        ;
+
+        return array_column($rows, 'uid');
+    }
 }