title: Best way to store emails for historical/review purposes
body: <p>I have a service which process emails in a mailbox and once processed, stores some information from the email in the database. At the minute the schema looks something like:</p>
  
  <ul>
  <li>ID</li>
  <li>Sender</li>
  <li>Subject</li>
  <li>Body (result of being parsed/stripped to plain text)</li>
  <li>DateReceived</li>
  </ul>
  
  <p>I am building a web front-end for the database and the main purpose of storing the emails is to provide the facility for users to look back and see what they have sent. However, another reason is for auditing purposes on my end.</p>
  
  <p>The emails at the moment are being moved to specific mailbox folders. So what I plan to start doing is once the email is processed, record it in the database and <strong>delete</strong> the email from the mailbox instead of just moving it.</p>
  
  <p>So a couple of questions...</p>
  
  <p>1) Is it a good idea to delete the actual email from exchange? Is it better to hold onto it <em>just in case</em>?<br/>
  2) To keep the size of the fields down I was stripping the HTML out of the emails, is this a bad idea? should I just store the email as it is received?<br/></p>
  
  <p>Any other advice/suggestions would be great.</p>