--- qmail-popup.8.orig  1998-06-15
+++ qmail-popup.8       2007-03-21
--- .././qmail-1.03/qmail-popup.8	Mon Jun 15 12:53:16 1998
+++ ../qmail-1.03.2418/qmail-popup.8	Wed Feb  1 22:49:44 2006
@@ -12,12 +12,12 @@
 .IR subprogram .
 
 .B qmail-popup
-is most commonly invoked from
-.B inetd
+typically from
+.B tcpserver  
 as
 
 .EX
-   qmail-popup CHANGEME checkpassword qmail-pop3d Maildir
+   tcpserver 0 pop3 qmail-popup CHANGEME checkpassword qmail-pop3d Maildir
 .EE
 
 with
@@ -53,6 +53,18 @@
 Even if you use APOP,
 an active attacker can still take over the connection
 and wreak havoc.
+
+However, 
+.B qmail-popup
+can be adviced to use a TLS encrypted session by means of the environment variable UCSPITLS.
+In this case,
+.B qmail-popup
+communicates with
+.B sslserver
+instead of the
+.B tcpserver 
+program interface through a control socket, a reading and a writing pipe dynamically
+defined during the session start to be used for transport layer encryption.
 
 .B qmail-popup
 has a 20-minute idle timeout.