Centos 7 : Setup Spamassassin

[Untouchable]

All steps that described bellow, tested and working on Centos 7 Vps + Sentora 1.0.0

1. Before we start, lets check for updates

Code:

su -c 'yum update'

2. Let's install now spamassassin, ( about 10mb )

Code:

sudo yum install spamassassin

3. Time for configuration

Code:

sudo nano /etc/mail/spamassassin/local.cf

You have to add the following lines, if already there just uncoment #

Code:

rewrite_header Subject ***SPAM***

Code:

required_hits 5.0

Code:

report_safe 0

Code:

required_score 5

Required_hits 5 is for small mail serv. You can increase it more if you need
Report_safe is on 0 here, but you can change to 1 or 2 ( see spamassassin guides )
Rewrite_header we call it ***SPAM*** here, you can call it as you want
Required_score can set form 0 -> 5 depends what you need

4. Now let's create a unique user and group

Code:

sudo groupadd spamd

Code:

sudo useradd -g spamd -s /bin/false -d /var/log/spamassassin spamd

Code:

sudo chown spamd:spamd /var/log/spamassassin

5. Configure the Postfix master.cf file to use the SpamAssassin

Code:

sudo nano /etc/postfix/master.cf

About line 11 in top add after smtpd

Code:

-o content_filter=spamassassin

Full line looks like that

Code:

smtp      inet  n       -       n       -       -       smtpd -o content_filter=spamassassin

And the end - bottom add

Code:

spamassassin unix - n n - - pipe flags=R user=spamd argv=/usr/bin/spamc -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}

6. Update spamassassin rules

Code:

sa-update --nogpg

7. Restart postfix - spamassassin

Code:

systemctl restart spamassassin

Code:

systemctl restart postfix

8. Check if spamassassin is listening

Code:

ss -tnlp | grep spamd

9. Test : create and send an email from external mail service with subject

Code:

XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X

On roundcube webmail it will be marked as spam.

Test spam message to see if it works : http://spamassassin.apache.org/gtube/