MailSite Knowledge Base

• MailSite 6.x

This document explains the default anti spam filtering Rules that are installed by the MailSite Install Wizard. It also explains how to restore them. Anti spam Rules will only work if Spam Scanning is enabled through the Spam Engine window, which requires a MailSite Anti Spam subscription http://www.rockliffe.com/products/as/ .

Default anti spam Rules

There are four anti spam Rules that are installed by the MailSite Install Wizard.

1. Server Receive Script Rule: "Reject Spam Score GE 9"

This Rule can be found in the Server/Security/Sieve Filter/Server Receive Script window in the MailSite Console. The Rule rejects all messages with a spam score that is greater than or equal to 9. The messages will be returned to the sender with a Non Delivery Report stating that "This message has been scored as spam with a probability of more than 90%"

2. Server Receive Script Rule: "Add Spam Score X-Header"

This Rule can be found in the Server/Security/Sieve Filter/Server Receive Script window in the MailSite Console. The Rule adds a Spam Score X-Header to all messages.

3. Server Receive Script Rule: "Add Spam Score to Subject"

This Rule can be found in the Server/Security/Sieve Filter/Server Receive Script window in the MailSite Console. The Rule inserts the spam score into the beginning of the message Subject line. The Rule can be set to be triggered by a specific spam score - the default setting is greater than or equal to 5. This Rule serves two purposes: it increases the visibility of the spam score; and it enables end users to manipulate messages based on the spam score using client-side filtering Rules in POP email clients such as Microsoft Outlook or Netscape Messenger.

4. Mailbox Delivery Script Rule: "Spam Trap"

This Rule quarantines messages that are suspected to be spam. The Rule can be found in the Server/Security/Sieve Filter/Mailbox Delivery Script window in the MailSite Console, and files all suspected spam messages into end users' "Junk Mail" IMAP folders. The default setting for a suspected spam message is "messages with a spam score that is greater than or equal to 8".

Restoring default anti spam Rules

Default anti spam Rules can be restored by deleting all the Rules in the Server Receive Script or Mailbox Delivery Script windows, clicking OK, and then reopening the window. The default Rules will have reappeared.

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