31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
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# Enable postscreen service
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__WARNING__: With postscreen service enabled, your users must use port 587 to
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send email, port 25 will be used by postscreen service instead of normal smtp
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service.
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iRedMail ships a script to enable postscreen. You can enable it with steps below:
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* Download script `enable_postscreen.sh` from [iRedMail source code repository](https://bitbucket.org/zhb/iredmail/src/default/iRedMail/tools/?at=default)
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* Upload this script to your iRedMail server, then below command to enable
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postscreen:
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```
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# bash enable_postscreen.sh
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```
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It uses several DNSBL servers by default, you'd better open
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`/etc/postfix/main.cf` (Linux/OpenBSD) or `/usr/local/etc/postfix/main.cf`
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(FreeBSD) to check the DNSBL servers it enabled, you're free to remove some
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DNSBL servers if you want.
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## See Also
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If you don't want to use postscreen service, you can [enable DNSBL service](./enable.dnsbl.html)
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instead, it helps a lot too, but less effective than postscreen service.
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## References
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* [Postfix Postscreen Howto](http://www.postfix.org/POSTSCREEN_README.html)
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* [Postfix manual page: postscreen(8)](http://www.postfix.org/postscreen.8.html)
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