Topic: Few suggestions
Virtual servers are very popular today i would like to give you few suggestions
1. Since VS are limited with resources maybe you should add option where user can choose will he install AV/Spam packages or not.
2. In Some virtualization solution services don't have access to 127.0.0.1 so they bind to server's IP ,maybe you can modify your script in order your mail solution to work in this servers too.
----Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Stable release is out.