We have a customer that get about 1000 emails each day on an fax-to-email account. All attachment have a unique number. We are looking for a solution where we strip all attachments to this email address and save the attachment to a file server.

Any idea if this can be done with Zimbra?

The email can be deleted after the attachment is stripped and saved to the folder where the customer can access it (on another server/ftp or something)