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-rw-r--r--program/include/rcube_shared.inc8
1 files changed, 6 insertions, 2 deletions
diff --git a/program/include/rcube_shared.inc b/program/include/rcube_shared.inc
index 7a0fd059d..2ac3f3c41 100644
--- a/program/include/rcube_shared.inc
+++ b/program/include/rcube_shared.inc
@@ -1218,8 +1218,12 @@ function send_nocacheing_headers()
// send header with expire date 30 days in future
function send_future_expire_header()
{
- if (!headers_sent())
- header("Expires: ".gmdate("D, d M Y H:i:s", mktime()+2600000)." GMT");
+ if (headers_sent())
+ return;
+
+ header("Expires: ".gmdate("D, d M Y H:i:s", mktime()+2600000)." GMT");
+ header("Cache-Control: ");
+ header("Pragma: ");
}