diff --git a/etc/sendmail/freebsd.mc b/etc/sendmail/freebsd.mc
index 9802ae0c3bbd..7f91abeb5b5d 100644
--- a/etc/sendmail/freebsd.mc
+++ b/etc/sendmail/freebsd.mc
@@ -58,14 +58,16 @@ FEATURE(virtusertable, `hash -o /etc/mail/virtusertable')
 dnl Uncomment to activate Realtime Blackhole List (recommended!)
 dnl information available at http://maps.vix.com/rbl/
 dnl FEATURE(dnsbl)
+dnl Alternatively, you can provide your own rejection message for the RBL:
+dnl FEATURE(dnsbl, `blackholes.mail-abuse.org', `"550 Mail from " $&{client_addr} " rejected, see http://mail-abuse.org/cgi-bin/lookup?" $&{client_addr}')
 
 dnl Other DNS based black hole lists
-dnl FEATURE(dnsbl,`blackholes.mail-abuse.org',` Mail from $&{client_addr} rejected, see http://mail-abuse.org/cgi-bin/lookup?$&{client_addr}')dnl
-dnl FEATURE(dnsbl,`relays.mail-abuse.org',` Mail from $&{client_addr} rejected; see http://mail-abuse.org/cgi-bin/nph-rss?$&{client_addr}')dnl
+dnl --------------------------------
+dnl MAPS Relay Spam Stopper (RSS): http://mail-abuse.org/rss/
+dnl FEATURE(dnsbl, `relays.mail-abuse.org', `"550 Mail from " $&{client_addr} " rejected; see http://mail-abuse.org/cgi-bin/nph-rss?" $&{client_addr}')
 
-dnl Many sites reject email connections from dialup ip addresses
-dnl by using the MAPS Dial-up User List (DUL).  http://maps.vix.com/dul/
-dnl FEATURE(dnsbl,`dialups.mail-abuse.org',` Mail from dial-up rejected; see http://mail-abuse.org/dul/enduser.htm')
+dnl MAPS Dial-up User List (DUL): http://maps.vix.com/dul/
+dnl FEATURE(dnsbl, `dialups.mail-abuse.org', `"550 Mail from dial-up rejected; see http://mail-abuse.org/dul/enduser.htm"')
 
 dnl Dialup users should uncomment and define this appropriately
 dnl define(`SMART_HOST', `your.isp.mail.server')