Blacklists are a little easier to understand in that you will find domains or senders that you simply do not want to receive mail from them ever. There are two blacklist directives.  The first directive, blacklist_from will specify a a sender address that address is what will appear in the Resent-From, From, Envelope-Sender, Resent-Sender or X-Envelope-From. When the sender address matches a score of 100 is added to the sender, which effectively blocks ...

Global Manual Whitelist Once you have set up Spamassassin so it is working and you have run it for some time you may want to tune it to provide automatic whitelists and blacklists.  The whitelist will provide a way to insure that the mail from a particular source will never get rejected.  This may be important clients, users on the system or messages from servers that do not necessarily have the right credentials for sending mail. Your company may have ...

Learning System You are able to additionally tune SpamAssassin to learn about your email.  Two programs are used together to create this learning system; autowhitelisting and Bayesian filtering.  Autowhitelisting is an algorithm that learns about each senders history and modifies the spam score of their subsequent mail.  This should ...

There will be times when you have you have your Postfix Mail Server set up and Spam is under control and all of a sudden you will see a new wave of Spam hit your site.  This article will help you see how you can make some small adjustments to cut down on new waves of Spam.  Here is an example of the new wave of Spam I started ...

Whitelists / Blacklists You can set up whitelists and blacklists to modify the settings to make sure certain email addresses never get blocked or always get blocked. Prevent any Spam Checking In order to create a situation where you have no Spam checking you can use the bypass option.  These options are added to ...

Amavisd-new acts as a connecting point between Spamassassin, Clamav and Postfix.  This is important to  remember because much of the configuration that would seem to be done on Spamassasin directly, actually occurs in the amavisd-new configuration file. When amavisd detects spam using Spamassassin it will log it to the log file and ...

Having tried a number of RBLs you will see that some are going out of existence, some are either too aggressive or just do not cover all of the areas that give you the protection you need.  Here is a list that makes a good combination of protection without getting too crazy.  Be sure to try one at a time so you can determine if one is ...

Spamassassin has a section in /usr/share/spamassassin called 25_body_tests_es.cf which deals with Spanish Spam.  These rules are not listed in the 50_scores.cf so as explained in the 50_scores.cf rules not listed automatically get a score of “1”.  In some cases that score may not be enough so you will want to modify it in ...