You can pipe email to python script. Tested with namecheap.com's Cpanel.
So, with this stuff you can setup an forwarder.
You will need to send email to install@your.domain a letter with 'install' in subject. And any character in the body. You will be notified from your server what you can do after, lol. Or just read my script
And here we have our script. Keep in mind to use mysql\etc as DB and change fwd.best to your domain
https://github.com/avtomatron/email_forwarder/blob/main/save.py