Filtering incoming mail

You should use procmail.

On the PCN mail server, procmail is used as the local delivery agent, and is run every time a message is delivered to you. To filter, just create a file named .procmailrc in your home directory, and place the rules you want procmail to follow in there.

For example, if you want to send email from spammer@some.com to the bit bucket, you would place the following lines in your .procmailrc:

:0:
* ^From:.*spammer@some.com
/dev/null

If you want to filter mail from fred@physics.purdue.edu into its own folder, rather than INBOX, you would add the following lines to your .procmailrc:

:0:  
* ^From:.*fred@physics.purdue.edu
~/Mail/fred

Procmail is capable of many, far more complex actions than can be reasonably covered here.

Further documentation can be found using the 'man' command, specifically:

man procmail

man procmailex

man procmailrc