====== DNSBL (DNS Block List) ======

===== Information =====

Using Spamhaus and Sorbes.

Configuration based on my [[:linux:server:spam|linux dnsbl configuration]]

===== Procedure =====

  - Add the following to your ''/usr/src/etc/sendmail/custom.mc'' file:\\ <code diff>--- shalom.mc.1.00.0.0  Mon Sep  3 14:45:38 2007
+++ shalom.mc.1.01.0.0  Mon Sep  3 16:39:45 2007
@@ -44,7 +44,7 @@
 #
 
 divert(0)
-VERSIONID(`$FreeBSD: src/etc/sendmail/shalom.mc,v 1.00.0.0 2007/09/02 23:54:00 john Exp $')
+VERSIONID(`$FreeBSD: src/etc/sendmail/shalom.mc,v 1.01.0.0 2007/09/03 16:33:00 john Exp $')
 OSTYPE(freebsd6)
 DOMAIN(generic)
 
@@ -67,6 +67,16 @@
 dnl For that, visit
 dnl http://directory.google.com/Top/Computers/Internet/Abuse/Spam/Blacklists/
 
+dnl# Spamhaus filtering configuration
+FEATURE(`enhdnsbl',`sbl-xbl.spamhaus.org',`"554 Rejected " $&{client_addr} " found in sbl-xbl.spamhaus.org.  If you think this is an error email root@thoughtbit.com from a different email server."')dnl
+
+dnl# Sorbs filtering configuration
+FEATURE(`dnsbl',`dnsbl.sorbs.net',`"554 Rejected " $&{client_addr} " found in dnsbl.sorbs.net.  If you think this is an error email root@thoughtbit.com from a different email server."')dnl
+
+dnl# Allowlist
+FEATURE(`access_db')dnl
+FEATURE(`delay_checks',`friend')dnl
+
 dnl Uncomment to activate Realtime Blackhole List
 dnl information available at http://www.mail-abuse.com/
 dnl NOTE: This is a subscription service as of July 31, 2001
@@ -88,7 +98,7 @@
 
 define(`confBIND_OPTS', `WorkAroundBrokenAAAA')
 define(`confNO_RCPT_ACTION', `add-to-undisclosed')
-define(`confPRIVACY_FLAGS', `authwarnings,noexpn,novrfy')
+define(`confPRIVACY_FLAGS', `authwarnings,noexpn,novrfy,restrictqrun,goaway')
 
 dnl# Also accept mail for localhost.localdomain:
 dnl LOCAL_DOMAIN(`localhost.localdomain')dnl
</code>
  - Rebuild your ''/usr/src/etc/sendmail/custom.cf'' file:\\ <code># cd /usr/src/sendmail
# rm custom.cf
# m4 -D_CF_DIR_=/usr/src/etc/sendmail/../../contrib/sendmail/cf/   /usr/src/etc/sendmail/../../contrib/sendmail/cf/m4/cf.m4 shalom.mc > shalom.cf
</code>
  - Install your new ''custom.cf'' file to ''/etc/mail/sendmail.cf''

===== Reference Links =====

  * [[:linux:server:spam]]
  *

==

\\ \\ 

{{tag>:freebsd}}