GPG Encryption

I’m new to Mautic, coming from Mailtrain. One of the features of Mailtrain that we are using is allowing subscribers to add their GPG public key in order to encrypt email to them. Looking through these forums and the documentation I’ve found I’m not seeing any core or 3rd party functionality to do this. Is there any interest in a feature like this, and if so, how would one implement it? Like I said, I’m new to Mautic. One simple reason to do this is to get past possibly misconfigured spam filters. It’s my suspicion, based on loose experimentation, that encrypted email can sail past a spam filter when it might otherwise get flagged and removed. It appears that they typically ignore encrypted email. I think email should be encrypted in general, so it seems like a win all the way around. Anyhow, thoughts and suggestions welcome.