I want someone to write me a system to do the same as [url removed, login to view] opt-inbox
We want the system to do spam email filtering via email challenge response.
Have a look at [url removed, login to view] opt-inbox so you know what we are after.
The system allows a user to have their emails checked on if they are not on a whitelist it will send the sender an email to verify they are human. This then sends the email on to them and puts them on the whitelist.
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