Questions tagged [postscreen]
Postscreen is a lightweight layer in front of postfix which performs simple tests on incoming connections to reduce the number of connections passed through to the actual SMTP-server thus reducing the server load.
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Postscreen sometimes stops the mail with 450 4.3.2 Service currently unavailable
I have a problem with postfix sometimes, inconsistently rejecting client mails:
Sep 15 09:24:07 mail postfix/postscreen[16209]: NOQUEUE: reject: RCPT from [x.x.x.x]:15037: 450 4.3.2 Service currently ...
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Postfix Postscreen: how to use postscreen for smtp and smtps both
I'm trying to get postscreen work. I've followed the man page and it's already running correctly for smtp.
But it I want to use it for smtps as well (adding the same line as smtp in master.cf but ...
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Resolve issues with DNSBLOG and b.barracudacentral.org
I am using postfix with DNSBLOG to prevent spam. The postfix main.cf is configured like:
postscreen_dnsbl_sites =
zen.spamhaus.org=127.0.0.[2..11]*3
b.barracudacentral.org=127.0.0.2*2
DNSBLOG is ...
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Using both SpamAssassin and postscreen in Postfix
I'm trying to set up an MX mail server using Postfix, postscreen and SpamAssassin.
According to the SpamAssassin documentation, I have to add -o content_filter to the smtp service in master.cf. This ...
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postscreen "deep protocol" tests and multiple MX IPs?
In the Postfix postscreen readme, it says the main limitation of "after 220 greeting" tests is that a new client must disconnect after passing these tests. To partially mitigate problems, it ...
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How can I reject spam before reaching SMTP on Postfix
My server has started receiving thousands of attempts to use my mail server to send spam from dynamic.hinet.net. The attempts are always rejected, but it's non-stop. I'd like to block these attempts ...
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