1 files changed, 1 insertions, 0 deletions
diff --git a/index.php b/index.php
index 3674db1d7..ae5df4000 100644
--- a/index.php
+++ b/index.php
@@ -44,6 +44,7 @@ $RCMAIL = rcmail::get_instance($GLOBALS['env']);
 
 // Make the whole PHP output non-cacheable (#1487797)
 $RCMAIL->output->nocacheing_headers();
+$RCMAIL->output->common_headers();
 
 // turn on output buffering
 ob_start();