RESIDENTIAL   SMALL BUSINESS   ENTERPRISE    Search  

    Spam Filtering with Netscape Communicator

    Tutorial

    Netscape's Communicator version 4.01 Communicator and higher includes Messenger Mailbox as an e-mail client. Messenger now does mail filtering. This tutorial here will show you how to set up and manage filters in Messenger Mailbox. It is recommended that you first read the general tips how to avoid spam on previous page -  Spam Tips.

    It will provide you with some useful tips to keep in mind when responding to email, registering on line or setting up your mail filters, regardless of which specific mail client you use.

    Setting up a Filter

    Netscape Messenger has a very nice and intuitive interface for designing filters. Basically, we have to tell the filter a sentence in the following form:

      "If the (selected field) of the message (specified condition),  (specified text string), then (specified action)."

    All that we have to do is fill in the parenthesis and we're done. In the  section below, we will tell the filter where to look, what to look for,  and what to do should it find something that matches. Let's go:

      1. The first thing to do is open up Communicator then get into the Messenger Mailbox:

      2. Once in Messenger, we have to go into EDIT then MAIL FILTERS on the menu bar:

      3. Clicking on this button will give us the Filter Management screen. Through this screen we can manage our filters:

      Since we have no filters set up as yet, the first thing that we should do here is click on NEW. The Filter Rules window will pop up:

      4. Let's make this a spam filter. Type Spam in the Filter name field. The next thing that we need to do is define a condition for the filter. A condition consists of two things: a specified field to check in all messages, and a text string that defines what the filter is to look for in that field. Since we want to catch some spam with this filter, the best thing to do here is think of something that is common to a lot of spam and then base the conditions for this filter around that.

      Since most of us are spammed by those lovely folks at CyberPromotions, set this filter up to catch spam from one of their more ubiquitous domains, savetrees.com.

      5. The next thing we have to do is define which field the filter is to check on incoming messages. Since we want to catch a particular sending domain, we should probably choose sender as the field to search. Here is a list of all of the possible options:

      They are all pretty self-explanatory. Whichever one you select will then be the part of all incoming messages that the filter will look in. The next step is to tell the filter how and what to look for in the field we just selected.

      6. There are a number of actions that the filter can perform during its search:

      contains: the specified text string must appear somewhere in the selected field for the filter to activate.

      doesn't contain: the specified text string must appear in the selected field for the filter to activate.

      is: the specified text string must be the ONLY thing to appear in the selected field. For example, if "savetrees.com" is the text string, and the Sender field contains spammer@savetrees.com, then a filter with this option set would NOT filter this message.

      isn't: the opposite of the above condition. If the selected field contains anything but the selected text string, it will be filtered.

      begins with: the selected text string must be the first thing to appear in the specified field.

      ends with: the selected text string must be the last thing to appear in the specified field.

      Since we want to look for something in particular that will most likely also have other things in the field as well, we should choose CONTAINS as the specified condition. This way, if "savetrees.com" appears anywhere in the sender field, regardless of what else may appear in there, the filter will activate.

      7. Okay, now we need to specify a text string that will be the search condition for the filter. This will be, of course, savetrees.com. Enter that in the window immediately to the right of the CONTAINS window.

      8. We've now told the filter everything it needs to know as far as where to look, how to look, and what to look for. So, now we need to tell it what to do if it finds a match. There are a number of actions that you can have Messenger do to any message that a filter catches. Let's go over what those options are:

       

      Move to folder: this option will make the filter move any messages that it matches into the folder that you specify.

      Change priority: this option will change the stamp of the priority on the filtered messages. For example, if an important message from your boss comes in with no priority, and you have a filter set up to filter messages from your boss' address, you can use this option to have those messages stamped with a high priority label in your inbox so that they will catch your attention.

      Delete: this option will simply delete any messages that this filter catches.

      Mark Read: this one will mark any filtered messages as already read.

      In the case of the first two options, a window will appear immediately to the right of the action window (in the picture above, the window with the trash can in it is the one that we are referring to that you will have to specify something further in. In the case of Move to folder, you will get a window that will let you choose which mailbox the filtered messages are to be transferred to. In the case of the Change Priority, the window will allow you to choose which priority label to change the message to.

      Since this filter deals with spam, you will probably want the filter to either delete the message right away or transfer it to the trash folder. The only reason that you may want to have the mail transferred to trash first is in case you wish to review it to make sure that no legitimate mail was erroneously caught by the filter. However, this particular filter that we are setting up is rather specific, and no one gets legitimate mail from savetrees.com, so we think that it is safe to just set this action to delete.

      If you set up some more generic filters (say, one that just searches the body of the message for a spammish phrase like "make more money"), you may want to have that filter transfer to trash instead of delete so you can check those messages first.

      The filter is pretty much done at this point. Should you eventually set up a large number of filters, you may want to type a description in the window provided so you can keep track of which filters do what. The last option that you can select is whether this particular filter is to be On or Off as set by the little check boxes at the bottom of the window. So, click the On checkbox and click OK at the bottom of the window.

      Now, let's go back to the main filter window for a little lesson in how to manage your filters as a group:

      Say, after using the spam filter for a while and deciding that you like what it does, that you decide to make filters to catch mail from your boss and your wife. You now have three filters and will want to maybe tweak how they work in relation to each other. So, here are your options as far as managing them:

      • One thing to consider is the order in which the filters are applied. You want to have your most important filters set first and the least important set last. For example, you would want a filter set to catch mail from your boss near the top of the chain and spam filters at the bottom. Why? Well, this way the important filters get first crack at the incoming mail, and you therefore have better odds of the right filter catching the right messages. You wouldn't want a spam filter to match one of your boss' messages and delete it. So, keep the spam filters at the end of the list. In the above example, the spam filter is set first. To move it down the list, you would simply click on the down arrow to the right and click it twice until the spam filter was listed last.

      • The next thing to worry about is what those little check marks mean. Basically, a check mark denotes a filter that is turned on and a little gray circle means that the filter is turned off and will not be applied to any incoming mail until it is turned on.

      • The last option to check here is the Log Filter Use box. If you check this, you will be able to check all logs of all actions that the filters took during the last mail download. Useful if you wish to see if the filters are working properly at a glance.


      Contact Information

      Ottawa Online Digital Development
      Tel:     (613) 742-5453
      Fax:    (613) 748-5772
      Email: info@ottawaonline.com

Contact Us
| Site Map
| Support Center
| Legal
                                     
    Copyright © 2001 Agnitio Networks, Inc. E-mail: webmaster