Install/Uninstall bash script for Mail Server on EC2 Ubuntu

Required: Installation and configuration of a mail server on AWS EC2 instance. Details: *IMPORTANT* Script should be expandable via configuration file to allow bash configuration of future additions to server requiring mail setup Bash script Ubuntu 11.4 Install and uninstall required in script (option for --uninstall) Configuration options required for new or existing server Configuration required for existing services requiring mail setup (eg: redmine) Exim (part 2 will have postfix first, then exim for all level2) Open to debate..understand the difficulties and limitations on AWS with mail, but also know it 'can' be done. Further requirements: Should auto start service Should be standalone and not regress current server configuration Should auto configure mail setup Auto start: There should be a init script as part of this with the capability to - START STOP STATUS RESTART the service. Project details: EC2 instance available for testing Script exists in draft format at BITBUCKET already. Redmine is used by me for tracking the project, bitbucket for the code.