How to set up a simple catch all database-based mail server?

As an experiment I am setting up a site similar to Mailinator and I want to set up a simple catch all database-based mail server.

I don't want a mail server that I need to set up users etc. I just want it to receive all mail and store the mail in a database (SQLite) so that I can retrieve it via SQL on the frontend.

What is the simplest method to do this? Are there existing packages that can do what I want? I have searched online but as I'm not exactly sure what I am searching for I'm not getting many results.

On the frontend I want to be able to just do something like this via SQL:

SELECT * FROM emails WHERE recipient = 'AvpKo7bbCq@tempemail.org'