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< title > Enable postscreen service< / title >
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// < a href = "./index.html" > Document Index< / a > < / div > < h1 id = "enable-postscreen-service" > Enable postscreen service< / h1 >
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< div class = "toc" >
< ul >
< li > < a href = "#enable-postscreen-service" > Enable postscreen service< / a > < ul >
< li > < a href = "#enable-postscreen-service_1" > Enable postscreen service< / a > < / li >
< li > < a href = "#see-also" > See Also< / a > < / li >
< li > < a href = "#references" > References< / a > < / li >
< / ul >
< / li >
< / ul >
< / div >
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< p > < strong > WARNING< / strong > : 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.< / p >
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< h2 id = "enable-postscreen-service_1" > Enable postscreen service< / h2 >
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< p > iRedMail ships a script to enable postscreen. You can enable it with steps below:< / p >
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< ol >
< li > Download script < code > enable_postscreen.sh< / code > from < a href = "https://bitbucket.org/zhb/iredmail/src/default/iRedMail/tools/?at=default" > iRedMail source code
repository< / a > < / li >
< li > Upload this script to your iRedMail server, then execute it to enable
postscreen service:< / li >
< / ol >
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< pre > < code > # bash enable_postscreen.sh
< / code > < / pre >
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< p > That's all.< / p >
< p > Important notes:< / p >
< ul >
< li > It will backup < code > /etc/postfix/main.cf< / code > and < code > /etc/postfix/master.cf< / code > first,
if postscreen doesn't work, you can restore these 2 files.< / li >
< li > It uses several DNSBL servers by default, you'd better open
< code > /etc/postfix/main.cf< / code > (Linux/OpenBSD) or < code > /usr/local/etc/postfix/main.cf< / code >
(FreeBSD) to check the DNSBL servers it enabled, you're free to remove some
of them (or add new ones) if you want.< / li >
< / ul >
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< h2 id = "see-also" > See Also< / h2 >
< p > If you don't want to use postscreen service, you can < a href = "./enable.dnsbl.html" > enable DNSBL service< / a >
instead, it helps a lot too, but less effective than postscreen service.< / p >
< h2 id = "references" > References< / h2 >
< ul >
< li > < a href = "http://www.postfix.org/POSTSCREEN_README.html" > Postfix Postscreen Howto< / a > < / li >
< li > < a href = "http://www.postfix.org/postscreen.8.html" > Postfix manual page: postscreen(8)< / a > < / li >
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< / ul > < p style = "text-align: center; color: grey;" > All documents are available in < a href = "https://bitbucket.org/zhb/iredmail-docs/src" > BitBucket repository< / a > , and published under < a href = "http://creativecommons.org/licenses/by-nd/3.0/us/" target = "_blank" > Creative Commons< / a > license. You can < a href = "https://bitbucket.org/zhb/iredmail-docs/get/tip.tar.bz2" > download the latest version< / a > for offline reading. If you found something wrong, please do < a href = "http://www.iredmail.org/contact.html" > contact us< / a > to fix it.< script >
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