You can programmatically do this using Gmail's API and a PHP script in a crontab. I have done this for reading emails sent to me from a credit card processor. Check out this site's how-to for some of the details.
Next, I'd put info in a MySQL DB, because I do that for everything I do.
Then use a PHP script and Gmail as a sender to send them a boilerplate email with your own From, From Name, and Reply-To addresses embedded. IMHO, for this get a [email protected] email address and use their SMTP sender to do this. Here's an example of how to do thisHere's an example of how to do this.