Automatically decrypt fetched PGP/Mime mail?

Greetings fetchmail-users mailing list!!

My mail fetching setup currently looks like this:
remote mail server <-> fetch <-> local maildir <-> local mail server <-> local e-mail client

Where email on the remote mail server is pgp/mime encrypted with the subject header hidden or replaced as supported by several of the email services listed below:
https://www.privacyguides.org/en/email/ - Encrypted Private Email Recommendations - Privacy Guides
https://www.privacyguides.org/en/email-aliasing/ - Email Aliasing - Privacy Guides

I would like to alter the "... <-> fetch <-> local maildir <-> ..." part of my mail fetching setup so that the fetched email is automatically decrypted during or after the fetching process and before this mail is seen by the local mail server or email client.
Does anyone on this mailing list have any advice or tips for doing this?