Email Warmup - Earn money by offering your inbox

For a good sender reputation for volume emails, Email warmup is the crucial part for anyone trying Email marketing.

Idea - Marketplace with 3 stakeholders

1. Senders - Ones who are interested in increasing the sender reputation for their email inbox
2. Receivers - Ones who offer their inbox to help the sender in building their reputation.
3. Platform/Tool - To send and emails and keep the track of the emails , transactions, regulate it and fair charges to both of the parties

How?

• Tool will be authenticating the senders only to send and receive emails and keep up their reputation measures in place.
• Receivers can register separately and become the part of the community where they have to reply to emails sent from senders as per their convenience (Use tools, extensions whatever to reply to designated senders)
• Receivers can buy a package of the X number of replies they can offer in Y time period
• Sender would be paying T amount for increasing their reputation and Recievers would be receiving T-n amount as part of the package bought

P.S From Email, Domain and IP address plays a crucial role apart from content and other factors. Haven't thought of IP address handling since it depends upon the ESP through which emails are being sent.

Thoughts?
If someone is interested, can think of building in Public and with a niche group in place.