diff --git a/offlineimap/accounts.py b/offlineimap/accounts.py
index 9d49546..e59c13a 100644
--- a/offlineimap/accounts.py
+++ b/offlineimap/accounts.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2003-2016 John Goerzen & contributors
+# Copyright (C) 2003-2019 John Goerzen & contributors
 #
 #    This program is free software; you can redistribute it and/or modify
 #    it under the terms of the GNU General Public License as published by
@@ -385,24 +385,24 @@ class SyncableAccount(Account):
                                   "[%s]"% (remotefolder.getname(), remoterepos))
                     continue # Ignore filtered folder.
 
-                # The remote folder names must not have the local sep char in
-                # their names since this would cause troubles while converting
-                # the name back (from local to remote).
-                sep = localrepos.getsep()
-                if (sep != os.path.sep and
-                    sep != remoterepos.getsep() and
-                    sep in remotefolder.getname()):
-                    self.ui.warn('', "Ignoring folder '%s' due to unsupported "
-                        "'%s' character serving as local separator."%
-                        (remotefolder.getname(), localrepos.getsep()))
-                    continue # Ignore unsupported folder name.
-
                 localfolder = self.get_local_folder(remotefolder)
                 if not localfolder.sync_this:
                     self.ui.debug('', "Not syncing filtered folder '%s'"
                                  "[%s]"% (localfolder.getname(), localfolder.repository))
                     continue # Ignore filtered folder.
 
+                # The remote folder names must not have the local sep char in
+                # their names since this would cause troubles while converting
+                # the name back (from local to remote).
+                sep = localrepos.getsep()
+                if (sep == os.path.sep or
+                    sep == remoterepos.getsep() or
+                    sep in remotefolder.getname()):
+                    self.ui.warn('', "Ignoring folder '%s' due to unsupported "
+                        "'%s' character serving as local separator."%
+                        (remotefolder.getname(), localrepos.getsep()))
+                    continue # Ignore unsupported folder name.
+
                 if not globals.options.singlethreading:
                     thread = InstanceLimitedThread(
                         limitNamespace="%s%s"% (