diff -Nur mailx-12.5-bak/nail.rc mailx-12.5/nail.rc
--- mailx-12.5-bak/nail.rc	2018-03-20 11:12:41.453000000 +0800
+++ mailx-12.5/nail.rc	2018-03-20 11:48:30.243000000 +0800
@@ -67,4 +67,4 @@
 
 # For Linux and BSD, this should be set.
 set bsdcompat
-
+set -S DEAD=""