SUMMARY: Rejecting spam / unsolicited mail on Solaris
2007-12-24 21:10:00
From: "Nils K. Schoyen" <nils at norsar.no>
Subject: SUMMARY: Rejecting spam / unsolicited mail on Solaris
To: codeprof at codeprof.com
Original posting:
> Any ideas on how to filter out spam when using Sendmail (and DtMail) o=
n
> Solaris?
> =20
> We have implemented access_db in sendmail, but it is (almost) impossib=
le
> to keep this list updated... We have also included DNS checks to rejec=
t mail
> from unresolvable domains, etc.
> =20
> Does anyone have experience with the Blackhole list (sendmail macro)?
Suggestions:
- never use sendmail - use qmail it's rcpthosts can be set just to accep=
t or=20
reject mail
- Create /etc/mail/Spammers file listing spammer's email addresses and c=
ode to=20
/etc/mail/sendmail.cf file: =20
=20
F{Spammer} /etc/mail/Spammers
R<$=3D{Spammer}> $#error $@ 5.7.1 $: "550 We don't accept mail fro=
m you"
R<$=3D{Spammer}.> $#error $@ 5.7.1 $: "550 We don't accept mail fro=
m you"
=20
Note the first whitespace character in each line must be a tab
- try procmail (http://www.sunfreeware.com and http://www.procmail.net)
- Check out PerlMX from http://activestate.com
- sendmail.cf: Kaccess hash /etc/mail/access
- http://www.networkdweebs.com/products/dspam/
=20
What we have implemented so far (sendmail):
In /etc/mail/sendmail.cf
Kaccess dbm -o /etc/mail/access
Example lines from /etc/mail/access
someone at somenet.com OK
arabia.com DISCARD
ALCUDIAGARDEN at terra.es DISCARD
green-card-visa.org DISCARD
After changes to this file:
makemap dbm /etc/mail/access < /etc/mail/access
We will probably implement the Blackhole list as well. In addition, we rece=
ntly bought
Trend Viruswall (content check) and Trend eManager (anti-spam features and =
more) for Solaris
(http://www.antivirus.com). =20
Thanks to all that replied!
Best regards,
Nils K. Sch=F8yen
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