How to execute php script when receiving mail?

Question

PHP

There is access to a server on FreeBSD, it has a web server and a mail server.
The task is to execute a ready-made PHP script when receiving a letter to a special mailbox, which sends a GET request with the parameters received in the letter.
The email template with the list of parameters can also be changed (to make it easier to parse the email with parameter values).
Devcot is installed on the server, there are manuals everywhere on the Internet how to do this for Postfix (google query: "php mail processing"), but I don't think I have it installed.

Answer 1

In addition to Dovecot, you must have an MTA (Postfix, Exim...) installed. And mail processing happens on MTA. Therefore, Google correctly tells you what to do.

Answer 2

In my case, the option with CRON was the most suitable. I added a check every 5 minutes
and in the script I check mail and perform actions. Start:
I have a time-critical procedure, 5 minutes was enough for me.
PS I'm fetching mail from a third party server.

Answer 3

The simplest is via .forward or procmail