How to receive letters on your server and then parse them through python?

Question

Python

Hello, I came across a disposable mailing address service on the Internet, I want to make the same one as a learning goal, but I don’t know where to start. I see the following algorithm of work:

1) Using python, I send a request to the rest api, which generates random mail with my domain, for example, [email protected]
2) I send some letter to this address.
3) Also with the help of a request, I receive a letter and save it to the database.
Googling information found postfix is ​​it suitable for my task? Sending messages is not needed at all, the main thing is receiving letters. How can I generate random email addresses? Advise what to read and what to understand is worth to solve the problem.