Postfix: Block sender
Sumber: http://www.cyberciti.biz/faq/howto-blacklist-reject-sender-email-address/
Q. I’ve Postfix based CentOS Linux server. I need to blacklist email ID: user@abadboy.com . How do I blacklist email address with postfix? I also have spamassassin software installed.
A. By default, the Postfix SMTP server accepts any sender address. However you can block / blacklist sender email address easily with Postfix. It has SMTP server access table.
Open /etc/postfix/sender_access file
- cd /etc/postfix
- vi sender_access
Append sender email id as follows: user@abadboy.com REJECT Save and close the file. Use postmap command to create a database:
- postmap hash:sender_access
Now open main.cf and add code as follows: smtpd_recipient_restrictions = check_sender_access hash:/etc/postfix/sender_access Save and close the file. Restart / reload postfix MTA:
- /etc/init.d/postfix restart
You can also use spamassassin to blacklist email address. Just add to your own spamassassin configuration or to /etc/mail/spamassassin/local.cf file:
- vi /etc/mail/spamassassin/local.cf
Append blacklist as follows: blacklist_from user@abadboy.com Save and close the file. Restart spamassassin:
- /etc/init.d/spamassassin restart
spamassassin will marke mail as SPAM instead of rejecting the same.