--- a/xml/dnsbl.in	Tue Mar 27 15:24:43 2007 -0700
+++ b/xml/dnsbl.in	Sat Jul 07 10:26:31 2007 -0700
@@ -182,7 +182,7 @@
                 If the configuration cannot be loaded due to a syntax error, the milter
                 will log the error and quit.  If the configuration cannot be reloaded
                 after being modified, the milter will log the error and send an email to
-                root from dnsbl@$hostname.  You probably want to added dnsbl@$hostname
+                root from dnsbl@$hostname.  You probably want to add dnsbl@$hostname
                 to your /etc/mail/virtusertable since otherwise sendmail will reject
                 that message.
             </para>
@@ -252,6 +252,15 @@
         <refsect1 id='filtering.1'>
             <title>Filtering Procedure</title>
             <para>
+                The SMTP envelope 'from' and 'to' values are used in various checks.
+                The first check is to see if a reply message (swapping the env_from and
+                env_to values) would be blocked.  That check is similar to the main
+                check described below, but there is no body content to be scanned, and
+                there is no client connection ip address to be checked against DNSBLs.
+                This prevents folks from sending mail to recipients that are unable to
+                reply.
+            </para>
+            <para>
                 If the client has authenticated with sendmail, the rate limits are
                 checked.  If the authenticated user has not exceeded the hourly rate
                 limit, then the mail is accepted, the filtering contexts are not used,