I am looking to have a web based email Spam challenge/response system developed similar to Spamarrest.com.
The User should be able to continue to use his current email address and email program (such as Outlook, Outlook Express, Eudora or Thunderbird), or use our online webmail system to access their email from anywhere.
The Software should offer the User complete control over their Mail receiving preferences. They can decide who is allowed to send them email by importing their personal address book, or entering their known and approved contact addresses directly into the system.
Emails from unknown senders will receive an auto-reply message containing a "challenge". If and when the sender completes the challenge (the response), their email will automatically be forwarded to the User's inbox, and they are then automatically added to the users authorized sender list.
The challenge will be easy for people, but impossible for automated systems (i.e. spambots) to complete because the text will be in image format.
Users can still review emails from unauthorized senders on our website at any time (in theiur "unverified" folder), as well as manually approve senders from whom they wish to receive email.
The system keeps your account simplified and uncluttered by automatically deleting unverified emails after 30 days.
The challenge/response system effectively blocks all the spam while still allowing friends, family and trusted contacts to email the user without the risk of being filtered out by imprecise software systems.
## 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
We would like the web engine to be PHP based with a Mysql backend but this will also probably need a simple mail engine built or modified.
Must be very scaleable.
Please also take a look at this link which talks about the principals of a challenge response email system:
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