Postfix spam prevention with simple means

I've published already quite a few tutorials on greylisting, rbls and so on. Here's another tutorial showing how you can reduce your spam with rather simple means.   First of all we need to edit the file /etc/postfix/ and add those lines: smtpd_helo_required     = yes strict_rfc821_envelopes = yes disable_vrfy_command = yes unknown_address_reject_code  = […]

Spamdyke as Antispam Solution in Plesk with Qmail

First of all you need to make sure that you have the necessary packages to compile spamdyke: apt-get install gcc make libc-dev   Then download the latest version:   At the moment that I'm writing this howto, the latest version is 4.0.10: wget tar -xvzf spamdyke-4.0.10.tgz cd spamdyke-4.0.10/spamdyke   After unpacking it, you […]

Using a content filter in Postfix using Spamassassin

This is a simple way of creating a content filter in Postfix using Spamassassin. You need to have Postfix running and the following packages installed for this tutorial to work: apt-get install spamassassin spamc After the installation you have to edit /etc/default/spamassassin and change the parameter ENABLED=1 in order to make spamassassin start correctly, then: /etc/init.d/spamassassin restart   Then we […]

Greylisting with Postfix

Greylisting is an effective method of reducing spam. There's a daemon called GLD which is quite easy to integrate into Postfix. If you do not have your Postfix installation running, checkout for my other howto's.   Installation of the needed package: apt-get install postfix-gld   For the service to really start, you need to modify the file /etc/default/gld and change […]