New to email application world. Need suggestions for email solution.

["Siragher, Joel" <js...@CSREES.USDA.GOV>]

Greetings fellow java developers: 

I am new to the email application world, and I need suggestions
regarding a java email solution. 

Our platform is win2000 sp4, running oracle and java 1.4.x. The office
runs on outlook. 

My company is developing a db based repository for case review.
Documents come in thru a web portal and are index by case number into
the database. 

A feature has come up that they want to add to the software. They want
to be able to take emails from clients related to case and insert them
into the document repository in the database. This will give the
customer service an email audit trail from customers. 

I thought about setting up an email address and have clients email the
documents to email address. This email would get to a separate email
server. The case number will be in the subject line. Some automated
functionality in the email server would call java code and insert the
email info {to: from: subject: body: attachment(s)} into the database
based on the case number. Of course I don't know anything about email
servers, java or other wise so this might not be possible :)

Does this sound reasonable?

How do I do it?

Have any of you done it before?