diff -urN postfix-2.9.1.orig/debian/postfix.postinst postfix-2.9.1/debian/postfix.postinst
--- postfix-2.9.1.orig/debian/postfix.postinst	2012-05-02 11:49:40.000000000 -0400
+++ postfix-2.9.1/debian/postfix.postinst	2012-05-02 11:50:57.074234379 -0400
@@ -41,6 +41,7 @@
     db_fset postfix/procmail changed $1
     db_fset postfix/mailbox_limit changed $1
     db_fset postfix/recipient_delim changed $1
+    db_fset postfix/protocols changed $1
 }
 
 set_postconf() {