an image of email server so that i can instantly create one, as well as an open source version of a site added with it so that i can login and manage email accounts.
We have a postfix image we could transfer to you. You'll also want webmin to admin the mailboxes... what flavor of webmail do you want?
How many users are you going to have?
What about Google Apps? (We're huge fans, even though they're hurting the ISPs) : https://productforums.google.com/forum/#!topic/apps/KOJJIifzycs%5B101-125%5D
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