@timconsidine
Cloudron seems to be using a very similar marketing strategy already, though arguably not advertising it adequately:
Cloudron - Complete Mail Solution
Whilst on this topic, some hosts are a bit nervous about Cloudron's email capability, or perhaps they are just nervous in general about email. (I think they don't want mass-mailing, emailing of newsletters, etc.) Perhaps somebody could give us some guidance or suggestions related to this?