1. add the following to the /etc/postfix/main.cf configuration file smtpd_delay_reject = yes smtpd_helo_required = yes smtpd_helo_restrictions = permit_mynetworks, check_helo_access hash:/etc/postfix/helo_access, reject_non_fqdn_hostname, reject_invalid_hostname, permit 2. create the file /etc/postfix/helo_access and add your restriction like example: myowndomain.com REJECT 3. create the database postmap /etc/postfix/helo_access 4. restart or reload postfix /etc/init.d/postfix reload or /etc/init.d/postfix restart

http://www.freesoftwaremagazine.com/articles/focus_spam_postfix

how to reject spam mails on postfix comming from the same domain email address?

1. add the following to the /etc/postfix/main.cf configuration file smtpd_delay_reject = yes smtpd_helo_required = yes smtpd_helo_restrictions = permit_mynetworks, check_helo_access hash:/etc/postfix/helo_access, reject_non_fqdn_hostname, reject_invalid_hostname, permit 2. create the file /etc/postfix/helo_access and add your restriction like example: myowndomain.com REJECT 3. create the database postmap /etc/postfix/helo_access 4. restart or reload postfix /etc/init.d/postfix reload or /etc/init.d/postfix restart 07.12.13

http://www.freesoftwaremagazine.com/articles/focus_spam_postfix

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