Receiving Email from within CI 4 and possible integration with the built-in Email cla

Hello friends and community members,

I reached a point where at least one of my CI4 apps needs to receive (or intercept incoming) e-mail, and it looks like the built-in Email class has no facility for it - which is natural.

Common sense would point to a 3rd party library, and in today's jungle of 'me too' products ranging from 'great fit's to misfits, I wanted to ask experts who might have already done this before. 

What do you think is the best email client library for integrating with CI4 compatible with PHP 8.3 (or 8.4 even better)?

My specific need is to receive (or intercept) emails sent to a specific account, do some processing (analytics, maybe also SPAM check), and then re-forward the same e-mail to a pre-defined set of recipients. I can do the sending already thanks to the built-in 

Email class, but receiving is not possible with the built-in classes and/or functions AFAIK.

Any ideas?

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