&gt; Email is still the most lucrative marketing channel you can devise. I&#x27;ve yet to find a better intra-office communication tool.<p>I would say that having a private intranet only NNTP server with discussion groups would be far better than just using email.<p>For one thing, you already have grouping of general topics on a server level rather than having to take the time to create rules&#x2F;filters and IMAP folders in using the email client.  Second, it&#x27;s much easier to access previous messages by just subscribing to the group (rather than having someone forward you an email which you have to read from bottom to top to get a summary of what was discussed).  Lastly, it separates discussions from personal communication (emails sent directly to you).