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PROGRAM:

NAME


cufilter - Filter emails through Mail::CheckUser

SYNOPSIS


Add the following lines to your ~/.procmailrc:

# Filter mail through Mail::CheckUser
:0f
| /usr/bin/cufilter

DESCRIPTION


When email messages are filtered through this program using the procmail settings as
outlined in the SYNOPSYS, the email address in the "From:" header is passed through
Mail::CheckUser to ensure validity. If there is a problem with the email address, the
"Subject:" header is modified to show which email address failed along with the failure
reason. No messages are lost, but it provides an easy way for the mail client to
organize, sort, or filter based on the subject tweaks.

EXAMPLES


Lets say a spammer sends a message with the following headers:

From: [email protected]
To: [email protected]
Subject: Happy Pill

Then the new headers might change to the following:

From: [email protected]
To: [email protected]
Subject: [CU![email protected]!DNS failure: SERVFAIL] Happy Pill

This makes it easy to filter for mail clients.

INSTALL


This file can be installed into /usr/bin/cufilter and is intended to be utilized through
the procmail functionality by adding the following lines to your ~/.procmailrc
configuration.

# Filter mail through Mail::CheckUser
:0f
| /usr/bin/cufilter

AUTHORS


Rob Brown [email protected]

COPYRIGHT


Copyright (c) 2003 Rob Brown [email protected]. All rights reserved.

This program is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.

$Id: cufilter,v 1.3 2003/09/18 15:36:26 hookbot Exp $

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