delayed gmail autoresponder

Seeking someone that can create a auto responder program for Gmail. Here are the features it MUST have below and MUST work flawless! 1. Login and check multiple (Hundreds) of gmail accounts for new unread emails. This needs to be "multi-threaded" to login to multiple accounts at once. 2. Time Delay setting to set time delay before email gets responded to. (each email must have its own timer on it. Example: An email comes in at 10 pm and I have it set to respond 30 minutes after, it will wait 30 minutes from the time that email was received before sending out a response.) 3. Import/Export multiple gmail accounts in .CSV and .txt format. 4. Ability to checkmark each account or all accounts and add one message to be added to checked accounts along with ability to add a message to a single account. Each account MUST have it's own set of messages that a user can input for responses. 5. Proxy supported e.g. ip:port:username:password and socks5. 6. Program MUST be protected and secured, And I need to be able generate a serial key on my end. It would be nice to have some sort of control on my end over the software on users machines. 7. Feature to send out tier responses, such as after the first response goes out, can have in the message settings to set as message response 1, message response 2, and so on along with a timer of how long to wait before sending out the other set of responses. This is my second time getting a program like this done and hopefully should be the last. IT NEEDS TO WORK FLAWLESS with no hang ups and respond to ALL emails that come in to each gmail account. This is a simple project but just needs to work flawless.