Service Description
Apple Mail

Mac OS X has its own spam filter which you can train. In the Mail > Junk Mail options, you can switch into 'Training' mode, where you see recognised spam in yourd Inbox. We would recommend leaving 'Trust junk mail headers set by your ISP' ticked, and also exempting senders in your address book and anyone using your full name.

You should then correct the decisions made by Mail. If you see something incorrectly marked as spam, open it and click on 'not junk'. If something should be marked, go to the 'Message' menu and 'mark as junk'. Once it seems to work OK turn the system from 'Training' to 'Automatic' mode.

You can also set up custom filters to take advantage of GreenNet's invisible header markings (and in later versions of Mail, even mark filtered messages as junk, which may or may not be worthwhile).

1. Go to Mail > Preferences > Rules.
2. Click 'Add Rule'
3. Under 'If' choose 'Edit Header List'
4. Click '+' to add a new header, and add 'X-Spam-Level', and click OK.
5. Type a name for the rule, e.g. 'SpamAssassin' and select 'If all the conditions are met'
6. Choose 'X-Spam-Level' 'contains' '*****'.
6a. You may want to add the condition 'Sender is not in my address book'
7. Choose to move the messages to the 'Spam' or 'Junk' mailbox.
8. Test the system works

See http://www.uab.edu/it/email/spam-filter-rules/applemail.html for similar instructions.

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Netscape (>4) and Mozilla (Thunderbird)

1. Click on [b]Tools[/b], [b]Message Filters…[/b]. This will bring up a window called [i]Message Filters[/i].
2. Select your GreenNet account in [b]Filters for[/b].
3. Click on the [b]New…[/b] button. This will bring up a window called [i]Filter Rules[/i].
4. In [b]Filter Name[/b] type [i]GreenNet Anti Spam filter[/i].
5. Select [b]Match any of the following[/b].
6. In the first drop-down list select [b]Customize…[/b]. This will bring up a window called [i]Customize Headers[/i].
7. Enter [b]X-Spam-Level[/b] under [b]New message header:[/b] and press the [b]Add[/b] button.
Outlook Express

If you are a GN user, are running Outlook Express (or Windows Mail) and want to use a spam filter.

1) First contact support@gn.apc.org to ensure a marker like “?spam” or “[SPAM]” is put into the subject line of suspected spam. (This may also detect some ‘backscatter’ from forged domains as ‘?spambounce’) If you are downloading your mail from GreenNet via POP or IMAP, you will probably see “?spam” on spam-like messages.

2) Then, in the main Outlook Express window, go to the Tools menu and select ‘Message Rules’, and then ‘Mail’. Then click on ‘New’ to create a new rule.
Training my spam filter

I know spamassassin well and use it for another email account I use. I also know that to work propoerly it needs to be trained to recognise new forms of Junk mail and to learn which spam it missed.

I regularly do this with my other account, but is there a way to do this for the instance of spamassassin running on the greennet servers? There are no instructions on the web site anywhere so you assistance in informing me about this process would be very helpful.
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