Setting up a secure, authenticated SMTP server on Debian

I need an experienced sysadmin to create for me a script that installs and configures a secure SMTP server with authentications (DKIM, SenderID, etc.) on a Debian machine. To assist with writing this script I will provide you with access to a virtual machine instance identical to the production machine. The configuration should be for high-performance, high-reliability, and high-deliverability service, that would ensure that genuine email will not be falsely marked as spam in any of the main free webmails (gmail, yahoo, msn, etc) nor in any of the main anti-spam enterprise and personal software (e.g. spamassasin). The SMTP should be available via some secure channel, e.g. in a similar way to gmail's SMTP servers (SSL/TLS?) so that standard desktop email clients (such as Outlook) can send through it securely. Please specify in your bid comment: • How much time do you need to complete this? • Which additional measures (other than DKIM and SenderID) will you integrate in the SMTP server in order to ensure a maximum delivery percentage? • Which security method will you use and what will it require me to provide precisely (e.g. some certificate)? • Can you write the script in Python? If not, in which language do you prefer writing it? ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Linux