It would be really useful if we could see the actual INV_RECP status messages vs simply displaying the generic invalid recipient message.

  elif key == 'INV_RECP':  # pragma: no cover
      self.status = 'invalid recipient'

The status codes + messages can be found here:
https://github.com/gpg/gnupg/blob/master/doc/DETAILS#inv_recp-inv_sgnr

I'm working on a project and it would insanely useful for me to see these status messages returned. Without the always-trust arg, a key needs to be ultimately trusted in order to encrypt something....and If the result status returned is Key not trusted (which corresponds to INV_RECP 10) then I know exactly what the issue is and how to handle it.

DEBUG:gnupg:[GNUPG:] KEY_CONSIDERED 8D2D438B13429DAA19AD116EBCC794837416F045 0
DEBUG:gnupg:[GNUPG:] KEY_CONSIDERED 8D2D438B13429DAA19AD116EBCC794837416F045 0
DEBUG:gnupg:gpg: BCFDACAB3D66F4CE: There is no assurance this key belongs to the named user
DEBUG:gnupg:[GNUPG:] INV_RECP 10 [email protected]
DEBUG:gnupg:[GNUPG:] FAILURE encrypt 53

I could implement this change if you want, but I'm pretty sure have your own way of doing things. There's only 15 status codes, so it shouldn't take a ridiculous amount of effort.

Also, I really want to thank you for maintaining such a cool and useful project!!!