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iredmail-doc/howto/enable.postscreen.md

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Enable postscreen service

WARNING: With postscreen service enabled, your users must use port 587 to send email, port 25 will be used by postscreen service instead of normal smtp service.

iRedMail ships a script to enable postscreen. You can enable it with steps below:

  • Download script enable_postscreen.sh from iRedMail source code repository
  • Upload this script to your iRedMail server, then below command to enable postscreen:
# bash enable_postscreen.sh

It uses several DNSBL servers by default, you'd better open /etc/postfix/main.cf (Linux/OpenBSD) or /usr/local/etc/postfix/main.cf (FreeBSD) to check the DNSBL servers it enabled, you're free to remove some DNSBL servers if you want.

See Also

If you don't want to use postscreen service, you can enable DNSBL service instead, it helps a lot too, but less effective than postscreen service.

References