@alex
I know this is not related to you, but I don't know anyone who might be able better than you.

I'm looking for email parsing software to receive email, search fr words using regex and then redirect the email if matched or discard it if it doesn't match.

I have a joomla plugin that is doing this but it's +10 years old.

I'm not looking for saas solution, I want something self hosted.

Any idea where I can find such thing?
Can you create such system?