Added entry about `mailx' variable

@@ -17,6 +17,9 @@ time units.
 
 ** Fixed memory allocation bug in mailbox/mu_auth.c
 
+** Various fixes and improvements in MH in order to interoperate better
+with MH-E.
+
 * New features.
 
 ** libmailbox
@@ -35,6 +38,16 @@ ANYOF
 
 *** popauth: new option --create.
 
+** mail
+
+New configuration file variable `mailx' enables the mailx
+compatibility mode .This is mainly visible when composing a message.
+In mailx compatibility mode, mail asks for Cc and Bcc addresses after
+composing the body.
+The default behavior is to ask for these values before composing
+the body.
+
+
 The option allows to convert a plaintext file into DBM database.