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-rw-r--r--program/lib/Roundcube/rcube_storage.php1
1 files changed, 1 insertions, 0 deletions
diff --git a/program/lib/Roundcube/rcube_storage.php b/program/lib/Roundcube/rcube_storage.php
index 245d911c0..7ec05b7af 100644
--- a/program/lib/Roundcube/rcube_storage.php
+++ b/program/lib/Roundcube/rcube_storage.php
@@ -65,6 +65,7 @@ abstract class rcube_storage
'MAIL-REPLY-TO',
'RETURN-PATH',
'DELIVERED-TO',
+ 'ENVELOPE-TO',
);
const UNKNOWN = 0;