A turnkey solution for registering mailboxes?

Question

postfix

Good afternoon!
The task is to register clients on a third-party resource.
You need to receive mail messages on your mail server, parse them (Login, Password) and write them to the database.
Perhaps there are some solutions besides dovecot + postfix?
API for receiving and registering mail, Yandex.Connect is not considered, mail activation is required there.