Postfix and bogofilter

[Jason Crowe]

A question about this. You tell it what's spam by forwarding message to 
a user. Won't bogomail eventualy see the local email addresses (in the 
forward to/from section) as spam?

good job. :)

Jason

jim wrote:

>I think postfix/bogofilter is working good enough to tell how I did it.  I 
>don't have procmail installed, so this is how I did it without it.  This is 
>on a mailserver that handles mail for a small number of users.
>
>1. Get postfix installed and running properly.
>
>2. Get bogofilter installed and running properly from the command line.
>
>3. Create a user, I used 'filter' as a username.  This user should not be able 
>to log in, but does need a home directory.  I used '/home/filter'.
>
>4. Put the bogofilter executable in /usr/sbin
>
>5. Put the following script in /usr/sbin
>
>#!/bin/bash
>
>export PATH=$PATH:/usr/sbin
>export HOME=/home/filter
>cd $HOME
>
>bogofilter -p | sendmail -i "$@"
>
>6. In the master.cf configuration file for postfix, find the line that looks 
>like:
>
>smtp	inet   (some other stuff)   	smtpd
>
>and add this line after it.
>
>	-o content_filter=filter:
>
>Be sure to include the ':' at the end of the line.
>
>7. Append these lines to the end of the master.cf file:
>
>filter    unix  -       n       n       -       -       pipe
>  user=filter argv=/usr/sbin/filtermail -f ${sender} -- ${recipient}
>
>8. Do a 'postfix reload'.
>
>9. Now, anything bogofilter recognizes as spam will have a header that looks 
>like:
>
>X-Spam-Status: Yes, tests=bogofilter
>
>and anything it doesn't think is spam will look like:
>
>X-Spam-Status: No, tests=bogofilter
>
>10. Even though bogofilter is now filtering your email.  It doesn't know what 
>to look for to distinguish spam from real email.  Create two other mail 
>accounts, one for spam and one for non-spam.  Anytime you receive spam that 
>bogofilter doesn't catch, forward it to the spam address.  Anytime you 
>receive good mail that bogofilter thinks is spam, forward it to the non-spam 
>address.  Periodically, log on to the mail server and go to the directory 
>where the spam mails are.  'su' as the user 'filter' and do a 'cat * | 
>bogofilter -s'.  Delete all the spam files.  Then go to the directory where 
>the good emails are and do a 'cat * | bogofilter -h'.  Then delete all the 
>good emails.  Hopefully, the performance of bogofilter improves over time.
>
>Bogofilter has a bug where the last line is sometimes duplicated using the 
>'-p' option.
>
>
>
>  
>