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-rw-r--r--config/defaults.inc.php3
1 files changed, 3 insertions, 0 deletions
diff --git a/config/defaults.inc.php b/config/defaults.inc.php
index 85190eb0a..859378624 100644
--- a/config/defaults.inc.php
+++ b/config/defaults.inc.php
@@ -173,6 +173,9 @@ $config['imap_auth_pw'] = null;
$config['imap_cache'] = null;
// Enables messages cache. Only 'db' cache is supported.
+// This requires an IMAP server that supports QRESYNC and CONDSTORE
+// extensions (RFC7162). See synchronize() in program/lib/Roundcube/rcube_imap_cache.php
+// for further info, or if you experience syncing problems.
$config['messages_cache'] = false;
// Lifetime of IMAP indexes cache. Possible units: s, m, h, d, w