Knowledge Base

You can block an e-mail using spam filters. To add an e-mail filter:

1. Click on the E-mail Filtering link in the Mail area.

2. Click on the Add Filter link.

3. Click on the required header field in the first drop-down list. These are the various fields in any e-mail message.

4. Click on the required filter action in the second drop-down list. This action will act on the text entered in the third field.

* equals - match the text exactly (whole words only). "Credit" will block "Credit".

* matches regex - matches the text based on regular expression (regex) rules. Regular expressions are a powerful but complex area. You do not need to use regular expression filters for most circumstances. Refer to these two good introductory tutorials - Using Regular Expressions and Learning to Use Regular Expressions - for more information.

* contains - match the specified text in any circumstance. "porn" will block "porn" and "pornography".

* begins with - match the specified text when it is the beginning of a word. "porn" will block "porn" and "pornography" but not "teenporn".

5. Enter the filter text in the third field. This text is case sensitive.

6. Enter the destination for the filtered e-mail in the Destination field. There are three separate types of destination:

* Destroy the e-mail - Enter Discard in the field.

* Redirect to another address - Enter the e-mail address to which to redirect the e-mail.

* Redirect to a script - Enter the full script path on the machine that hosts your web site.

7. Click on the Activate button.

Example:

* To redirect all e-mail from "john@paradise.net", enter: From, equals, john@paradise.net, david@corse.org.nz

* To delete all e-mail from paradise.net, enter: From, contains, paradise.net, Discard

* To delete all references to pornography, enter: Any Header, contains, porn, Discard

* To discard all e-mail that Spam Assassin has marked as spam, enter: SpamAssassin Spam Header, begins with, yes, Discard

Spam Assassin is a mail filter installed on a mail server used to identify spam. It checks for spam using a large number of pre-set rules that check the header, body, and sender of all e-mail messages sent to your domain mailbox.

To enable Spam Assassin:

1. Click on the Spam Assassin link in the Mail area.

2. Click on the Enable Spam Assassin button.