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  = 554 […]

Using 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 need a user under which the filter will be executed, in […]

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 […]