Postfix

ISH Konfiguration

Siehe mein Posting bei Fedoraforum.de.

Mit TLS und CRAM-MD5

relayhost = smtp.ish.de
smtp_sasl_auth_enable = yes
smtp_use_tls = yes
smtp_sasl_security_options = noanonymous
smtp_sasl_mechanism_filter = cram-md5

Ohne TLS , PLAIN/LOGIN

relayhost = smtp.ish.de
smtp_sasl_auth_enable = yes
smtp_use_tls = no
smtp_sasl_security_options = noanonymous
smtp_sasl_mechanism_filter = plain,login,cram-md5

SpamAssassin Integration

Siehe Anleitung hier.

Meine Schritte:

• Spamassassins von openSUSE verwenden

• User und Gruppe filter angelegt mit $HOME=/home/filter

• Datei /home/filter/sc/filter.sh angelegt mit 755 Permissions und filter:filter Owner. Dateininhalt:

#!/bin/sh
INSPECT_DIR=/var/spool/filter
SENDMAIL=/usr/sbin/sendmail
SPAMASSASSIN=/usr/bin/spamc
# Exit codes from <sysexits.h>
EX_TEMPFAIL=75
EX_UNAVAILABLE=69
cd $INSPECT_DIR || { echo $INSPECT_DIR does not exist; exit $EX_TEMPFAIL; }
# Clean up when done or when aborting.
trap "rm -f in.$$; rm -f out.$$" 0 1 2 3 15
# Parameter for $SPAMASSASSIN
#  -P   Pipe message, don't deliver
#  -x   Disable user config files
#  -a   Use auto-whitelists
cat | $SPAMASSASSIN  > out.$$ || { echo Message content rejected; exit $EX_UNAVAILABLE; }
$SENDMAIL -i "$@" < out.$$
exit $?

• /etc/mail/spamassassin/local.cf angelegt mit Inhalt:

required_score          4.0
rewrite_header Subject  ****SPAM(_SCORE_)****
report_safe             1
use_bayes               1
skip_rbl_checks         0
use_razor2              1
use_dcc                 1
use_pyzor               1
ok_locales              en
bayes_auto_learn        1
# SUSE default
ifplugin Mail::SpamAssassin::Plugin::URIDNSBL
uridnsbl_skip_domain suse.de opensuse.org suse.com suse.org
uridnsbl_skip_domain novell.com novell.org novell.ru novell.de novell.hu novell.co.uk
endif   # Mail::SpamAssassin::Plugin::URIDNSBL

• spamd starten und in runlevel setzen:

/etc/init.d/spamd start
insserv spamd

• Postfix master.cf anpassen:

smtp      inet  n       -       n       -       -       smtpd -o content_filter=filter:
...
...
# SPAMASSASIN
filter    unix  -       n       n       -       -       pipe
  user=filter argv=/home/filter/sc/filter.sh -f ${sender} -- ${recipient}

• Auto-Update der Bayes-Filter in /etc/cron.daily/spamassassins-update

#!/bin/sh
/usr/bin/sa-update --channel updates.spamassassin.org

• Spamassassin-Installation überprüfen:

spamassassin -D --lint

• Sieve-Filter für SPAM-Emails einrichten, siehe auch Dovecot, z.B.

require "fileinto";
if exists "X-Spam-Flag" {
  fileinto "SPAM";
}

Weblinks

• http://www.postfix.org
• Nicht IP-basierte Relaymethoden