[CentOS] sendmail and spam

Kirk Bocek t004 at kbocek.com
Wed Jun 4 21:02:54 UTC 2008

Alain Terriault wrote:
> Hi,
> What is todays most effective combination to filter spam ?
> On my old Redhat 3 system I used Sendmail and Spamassasin .. it was
> good, but with the current setup we are getting way to much spam.
> Looking around I found new players, well some I did not know then and
> they are very interesting..
> MailScanner .. http://www.mailscanner.info/
> Sagator .. http://www.salstar.sk/sagator/
> Smf .. http://smfs.sourceforge.net/index.html
> dspam .. http://dspam.nuclearelephant.com/index.shtml
> I am tempted to go with smfs because it is familiar .. but, mailscanner
> seems popular

I've been very happy using the RBLs with Sendmail. In sendmail.mc add:

dnl #
dnl # dnsbl - DNS based Blackhole List/Black List/Rejection list
dnl # See http://www.sendmail.org/m4/features.html#dnsbl
dnl #
FEATURE(`dnsbl', `bl.spamcop.net', `"Spam blocked see:
FEATURE(`dnsbl', `cbl.abuseat.org', `"Spam blocked see:
FEATURE(`dnsbl', `sbl.spamhaus.org', `"Spam blocked see:
FEATURE(`dnsbl', `list.dsbl.org', `"Spam blocked see:
FEATURE(`dnsbl',`dnsbl.sorbs.net',`"554 Spam blocked " $&{client_addr} " found
in dnsbl.sorbs.net"')dnl
dnl #

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