Configuration SMTP dans CSF ConfigServe:
Prerequisites:
The following assumptions are made:
- CentOS 7.2
- Postfix 3.1 (same configuration works on 2.10 also)
- SpamAssassin 3.4.0
You can check the Postfix version with
postconf -d | grep mail_version
And the SpamAssassin version with:
spamassassin -V
Install and configure SpamAssassin
Install SpamAssassin:
yum update
yum install spamassassin
Configure SpamAssassin by editing the configuration file:
vi /etc/mail/spamassassin/local.cf
Uncomment, or insert the following:
required_hits 5.0
report_safe 0
required_score 5
rewrite_header Subject [SPAM]
Add new user to run SpamAssassin: -g = add to group spamd, -s /bin/false = No shell (does not mean, cannot access via SSH!), -d = home dir
groupadd spamd
useradd -g spamd -s /bin/false -d /var/log/spamassassin spamd
chown spamd:spamd /var/log/spamassassin
Enable (if not automatically enabled) and start the service:
systemctl enable spamassassin
systemctl start spamassassin
Update the spam rules by running:
sa-update
Configure Postfix to use SpamAssassin
Configure the Postfix by editing the master.cf configuration file:
Open conf in editor:
vi /etc/postfix/master.cf
On the top, replace
smtp inet n - n - - smtpd
with
smtp inet n - n - - smtpd -o content_filter=spamassassin
Add this as the last line:
spamassassin unix - n n - - pipe flags=R user=spamd argv=/usr/bin/spamc -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}
Restart Postfix
systemctl restart postfix
Test the spam detection
Test, by sending an email outside of this mail server.
Title does not matter, enter XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34Xas the message body.
If all went well, your inbox should now have an email with a title beginning with [SPAM].
You shoud check the logs, what just happened, by querying journal with:
journalctl | grep spam
Automate the spam definition updates
Automatic definition updates with cron (run every night at 01.00)
00 01 * * * root /bin/sa-update && /sbin/service spamassassin restart
Check, that it has been run:
grep "sa-update" /var/log/cron
There we go, most spam should now be marked as such.
