diff --git a/data/web/inc/functions.mailbox.inc.php b/data/web/inc/functions.mailbox.inc.php
index 7f8ff3ac1..d6a07eab7 100644
--- a/data/web/inc/functions.mailbox.inc.php
+++ b/data/web/inc/functions.mailbox.inc.php
@@ -336,9 +336,34 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
           $mins_interval        = $_data['mins_interval'];
           $enc1                 = $_data['enc1'];
           $custom_params        = (empty(trim($_data['custom_params']))) ? '' : trim($_data['custom_params']);
-          // Workaround, fixme
-          if (stripos($custom_params, 'pipemess') || stripos($custom_params, 'pipemes')) {
-            $custom_params = '';
+
+          // validate custom params
+          foreach (explode(' -', $custom_params) as $param){
+            if (str_contains($param, ' ')) {
+              // bad char
+              $_SESSION['return'][] = array(
+                'type' => 'danger',
+                'log' => array(__FUNCTION__, $_action, $_type, $_data_log, $_attr),
+                'msg' => 'bad character SPACE'
+              );
+              return false;
+            }
+
+            // extract option
+            if (str_contains($param, '=')) $param = explode('=', $param)[0];
+            // remove first char if first char is -
+            if ($param[0] == '-') $param = ltrim($param, $param[0]);
+            
+            // check if param is whitelisted
+            if (!in_array(strtolower($param), $GLOBALS["IMAPSYNC_OPTIONS"]["whitelist"])){
+              // bad option
+              $_SESSION['return'][] = array(
+                'type' => 'danger',
+                'log' => array(__FUNCTION__, $_action, $_type, $_data_log, $_attr),
+                'msg' => 'bad option '. $param
+              );
+              return false;
+            }
           }
           if (empty($subfolder2)) {
             $subfolder2 = "";
@@ -1764,8 +1789,34 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
               );
               continue;
             }
-            if (stripos($custom_params, 'pipemess') || stripos($custom_params, 'pipemes')) {
-              $custom_params = '';
+
+            // validate custom params
+            foreach (explode(' -', $custom_params) as $param){
+              if (str_contains($param, ' ')) {
+                // bad char
+                $_SESSION['return'][] = array(
+                  'type' => 'danger',
+                  'log' => array(__FUNCTION__, $_action, $_type, $_data_log, $_attr),
+                  'msg' => 'bad character SPACE'
+                );
+                return false;
+              }
+  
+              // extract option
+              if (str_contains($param, '=')) $param = explode('=', $param)[0];
+              // remove first char if first char is -
+              if ($param[0] == '-') $param = ltrim($param, $param[0]);
+              
+              // check if param is whitelisted
+              if (!in_array(strtolower($param), $GLOBALS["IMAPSYNC_OPTIONS"]["whitelist"])){
+                // bad option
+                $_SESSION['return'][] = array(
+                  'type' => 'danger',
+                  'log' => array(__FUNCTION__, $_action, $_type, $_data_log, $_attr),
+                  'msg' => 'bad option '. $param
+                );
+                return false;
+              }
             }
             if (empty($subfolder2)) {
               $subfolder2 = "";
diff --git a/data/web/inc/init_db.inc.php b/data/web/inc/init_db.inc.php
index 88be5bca5..1e53d4b85 100644
--- a/data/web/inc/init_db.inc.php
+++ b/data/web/inc/init_db.inc.php
@@ -3,7 +3,7 @@ function init_db_schema() {
   try {
     global $pdo;
 
-    $db_version = "20052022_0938";
+    $db_version = "18062022_1153";
 
     $stmt = $pdo->query("SHOW TABLES LIKE 'versions'");
     $num_results = count($stmt->fetchAll(PDO::FETCH_ASSOC));
@@ -440,7 +440,7 @@ function init_db_schema() {
           "spam_score" => "TINYINT(1) NOT NULL DEFAULT '1'",
           "spam_policy" => "TINYINT(1) NOT NULL DEFAULT '1'",
           "delimiter_action" => "TINYINT(1) NOT NULL DEFAULT '1'",
-          "syncjobs" => "TINYINT(1) NOT NULL DEFAULT '1'",
+          "syncjobs" => "TINYINT(1) NOT NULL DEFAULT '0'",
           "eas_reset" => "TINYINT(1) NOT NULL DEFAULT '1'",
           "sogo_profile_reset" => "TINYINT(1) NOT NULL DEFAULT '0'",
           "pushover" => "TINYINT(1) NOT NULL DEFAULT '1'",
@@ -1228,8 +1228,17 @@ function init_db_schema() {
     }
     
     // Mitigate imapsync pipemess issue
-    $pdo->query("UPDATE `imapsync` SET `custom_params` = '' WHERE `custom_params` LIKE '%pipemess%' OR `custom_params` LIKE '%pipemes%';");
-    
+    $pdo->query("UPDATE `imapsync` SET `custom_params` = '' 
+      WHERE `custom_params` LIKE '%pipemess%' 
+        OR custom_params LIKE '%skipmess%' 
+        OR custom_params LIKE '%delete2foldersonly%' 
+        OR custom_params LIKE '%delete2foldersbutnot%' 
+        OR custom_params LIKE '%regexflag%' 
+        OR custom_params LIKE '%pipemess%' 
+        OR custom_params LIKE '%regextrans2%' 
+        OR custom_params LIKE '%maxlinelengthcmd%';");
+
+
     // Migrate webauthn tfa
     $stmt = $pdo->query("ALTER TABLE `tfa` MODIFY COLUMN `authmech` ENUM('yubi_otp', 'u2f', 'hotp', 'totp', 'webauthn')");
 
diff --git a/data/web/inc/vars.inc.php b/data/web/inc/vars.inc.php
index c8e79bc47..6e08be130 100644
--- a/data/web/inc/vars.inc.php
+++ b/data/web/inc/vars.inc.php
@@ -228,3 +228,135 @@ $RSPAMD_MAPS = array(
     'Monitoring Hosts' => 'monitoring_nolog.map'
   )
 );
+
+
+$IMAPSYNC_OPTIONS = array(
+  'whitelist' => array(
+      'log',
+      'showpasswords',   
+      'nossl1',            
+      'nossl2',            
+      'ssl2',              
+      'notls1',             
+      'notls2',            
+      'tls2',              
+      'debugssl', 
+      'sslargs1',
+      'sslargs2', 
+      'authmech1',
+      'authmech2',
+      'authuser1', 
+      'authuser2',  
+      'proxyauth1',        
+      'proxyauth2',        
+      'authmd51',          
+      'authmd52',         
+      'domain1',
+      'domain2',
+      'oauthaccesstoken1',
+      'oauthaccesstoken2',
+      'oauthdirect1',
+      'oauthdirect2',
+      'folder',
+      'folder', 
+      'folderrec',
+      'folderrec', 
+      'folderfirst',
+      'folderfirst', 
+      'folderlast',
+      'folderlast',
+      'nomixfolders',  
+      'skipemptyfolders',
+      'include',
+      'include',
+      'subfolder1',
+      'subscribed',
+      'subscribe',  
+      'prefix1',
+      'prefix2',
+      'sep1',
+      'sep2',
+      'nofoldersizesatend',
+      'justfoldersizes', 
+      'pidfile', 
+      'pidfilelocking',  
+      'nolog',        
+      'logfile', 
+      'logdir',
+      'debugcrossduplicates', 
+      'disarmreadreceipts', 
+      'truncmess', 
+      'synclabels',     
+      'resynclabels',     
+      'resyncflags',   
+      'noresyncflags',  
+      'filterbuggyflags',  
+      'expunge1',       
+      'noexpunge1',    
+      'delete1emptyfolders',
+      'delete2folders',   
+      'noexpunge2',   
+      'nouidexpunge2',   
+      'syncinternaldates',
+      'idatefromheader', 
+      'maxsize',
+      'minsize',
+      'minage',
+      'search', 
+      'search1',
+      'search2', 
+      'noabletosearch',  
+      'noabletosearch1',   
+      'noabletosearch2',  
+      'maxlinelength',
+      'useheader',
+      'useheader',   
+      'syncduplicates',
+      'usecache',      
+      'nousecache',   
+      'useuid',     
+      'syncacls',
+      'nosyncacls',   
+      'debug',           
+      'debugfolders', 
+      'debugcontent',    
+      'debugflags',     
+      'debugimap1',   
+      'debugimap2',    
+      'debugimap',       
+      'debugmemory',     
+      'errorsmax',
+      'tests',      
+      'testslive',    
+      'testslive6',     
+      'gmail1',    
+      'gmail2',    
+      'office1',      
+      'office2',   
+      'exchange1',   
+      'exchange2',   
+      'domino1',  
+      'domino2',   
+      'keepalive1',   
+      'keepalive2',     
+      'maxmessagespersecond',
+      'maxbytesafter',
+      'maxsleep',
+      'abort',       
+      'exitwhenover',
+      'noid',  
+      'justconnect',   
+      'justlogin',  
+      'justfolders'
+  ),
+  'blacklist' => array(
+      'skipmess',
+      'delete2foldersonly',
+      'delete2foldersbutnot',
+      'regexflag',
+      'regexmess',
+      'pipemess',
+      'regextrans2',
+      'maxlinelengthcmd'
+  )
+);