--- mpack-1.6/unixpk.c	2003-07-21 22:50:41.000000000 +0200
+++ mpack-1.6/unixpk.c	2018-09-16 12:57:14.104026964 +0200
@@ -254,8 +254,9 @@
 #ifdef SCO
     execv("/usr/lib/mail/execmail", addr+start);
 #else
+    execvp("sendmail", addr+start);
     execv("/usr/lib/sendmail", addr+start);
     execv("/usr/sbin/sendmail", addr+start);
 #endif
     perror("execv");
     _exit(1);