howto autosave email attachments?

[Johannes Wiedersich <johannes@physik.blm.tu-muenchen.de>]

We have a shiny new printer/copier/scanner. It sends scanned pages as 
email attachments. Instead of manually selecting individual email 
adresses on the cumbersome telephone-like local keyboard, it would be 
handy to mail all of them to the same e-mail address and have the 
attachments automatically extracted and saved on a network share of the 
email server.

The idea is to have a special user 'scanner'. All email attachments of 
any mail to this user are saved to /folder/for/scans and email deleted.

How would this be done?

Debian sarge.

Thanks,

Johannes