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How to filter email using rules

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Information

 
Description

How can I filter out certain messages from arriving in my mailbox?

Solution

You can use rules on several parts of a message to filter mail. 

The syntax below shows the different portions of a message that can be filtered:

B~filtered content in body:spambox
S~filtered content in subject:spambox
H~filtered content in header:spambox
F~filtered content in From address:spambox
T~filtered content in To address:spambox
N~filtered content in Sender:spambox

The expressions for each element of a delivery rule follow:

Message Area
From: F
Subject: S
Sender: N
To: T
entire header (everything preceding the body) H
entire body of message B

Condition Expression
contains ~
does not contain !~
equals =
does not equal !=

Text Pattern Expression
Any character .
Any of the values separated by vertical bars within the parentheses; the 
vertical bar represents "or" (this|that|other)
Any word character (a-z, A-Z, 0-9) \w
Any non-word character \W
Any digit (0-9) \d
Any non-digit \D
Any white space (spaces and/or tabs and/or carriage returns) \s
Any non-white space \S
Any punctuation character (any character other than \w or \s) \p
Any non-punctuation character \P

Quantifier Expression
Zero or more *
One or more +
Exactly 100 {100}
At least n1, but not more than n2 (where n1 and n2 are numbers) {n1,n2}

Note: As shown above, the following characters have special meaning in a rule: {}()|*+,.:\ If you want to use one of these characters in a search string, precede it with a backslash. For example, to search for a plus sign, enter \+ in the search string.

Note that only the first 32,000 bytes of a message is checked. Please see the bottom of this page:

For example, if you wanted to monitor any mail with the subject "Kill Dusty", then you could have a rule like this:

S~catch dusty:spambox

This would catch messages with the subject:

"I want to catch Dusty"

but it would not catch:

"I am going to catch up with Dusty".

In this example, the ":spambox" sends the message to a subfolder in the user's mailbox called "spambox".

In this example, it is checking for messages with Nothing in the subject, or there is no subject line:
H!~Subject\: (\w|\S)*:NUL 
This searches the Header to see if there is a Subject: line and that it contains any word characters or any non-white space.

It is necessary to stop and restart the SMTP and Queue Manager services after making modifications to rules.ima to activate the new filter settings.

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