diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..723ef36
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea
\ No newline at end of file
diff --git a/sync/.gitignore b/sync/.gitignore
index 034d086..a8722dd 100644
--- a/sync/.gitignore
+++ b/sync/.gitignore
@@ -1,8 +1,9 @@
 bin
-logs
+logs/*
+!logs/.gitkeep
 build
 vendor
 test.php
 .DS_Store
 attachments
-node_modules
+node_modules
\ No newline at end of file
diff --git a/sync/db/003_folders.sql b/sync/db/003_folders.sql
index 9a0e9a1..1a99f42 100644
--- a/sync/db/003_folders.sql
+++ b/sync/db/003_folders.sql
@@ -4,9 +4,10 @@ CREATE TABLE IF NOT EXISTS `folders` (
   `name` varchar(150) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `count` int(10) unsigned DEFAULT '0',
   `synced` int(10) unsigned DEFAULT '0',
+  `uid_validity` int(10) unsigned DEFAULT '0',
   `deleted` tinyint(1) unsigned DEFAULT '0',
   `ignored` tinyint(1) unsigned DEFAULT '0',
   `created_at` timestamp NULL DEFAULT NULL,
   PRIMARY KEY (`id`),
   UNIQUE( `account_id`, `name` )
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
\ No newline at end of file
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
diff --git a/sync/db/004_messages.sql b/sync/db/004_messages.sql
index 91bc194..b57db68 100644
--- a/sync/db/004_messages.sql
+++ b/sync/db/004_messages.sql
@@ -5,6 +5,7 @@ CREATE TABLE IF NOT EXISTS `messages` (
   `unique_id` int(10) unsigned DEFAULT NULL,
   `thread_id` int(10) unsigned DEFAULT NULL,
   `outbox_id` int(10) unsigned DEFAULT NULL,
+  `uid_validity` int(10) unsigned DEFAULT NULL,
   `date_str` varchar(100) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `charset` varchar(100) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `subject` varchar(270) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
@@ -49,4 +50,4 @@ CREATE TABLE IF NOT EXISTS `messages` (
   INDEX (`message_id`(16)),
   INDEX (`in_reply_to`(16)),
   FULLTEXT KEY subject_text_plain (subject,text_plain)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
\ No newline at end of file
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
diff --git a/sync/logs/.gitkeep b/sync/logs/.gitkeep
new file mode 100644
index 0000000..e69de29