View source for Block mailsby Subject

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=How to block mails by subjects?=
{{KB|{{Unsupported}}|{{ZCS 9.0}}|{{ZCS 8.0}}|}}
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===Overview===

Often there are spam attacks where mails are based on subjects that contain certain structures or words. Below steps can be followed to blacklist such mails having a common subject.

===Solution===

Create file example.cf in spamassassin folder as root

<pre>
vi /opt/zimbra/data/spamassassin/rules/example.cf
</pre>

Fill with the following example
<pre>
header     SPAM_BANNED     Subject =~ /subjectname/i
describe   SPAM_BANNED     Subject contains subjectname
score      SPAM_BANNED     40.0
</pre>

'''Note''': SPAM_BANNED is name of ACL who created. subjectname is subject who want to blacklisted and score 40.0 is score who given if subject meet with the ACL.
If you want to create blacklist to other word/subject, don’t use the same name of ACL and create another ACL name.

Save and give owner for user and group Zimbra and restart antispam service
<pre>
chown zimbra.zimbra /opt/zimbra/data/spamassassin/rules/example.cf
zmantispamctl restart 
</pre>