Error while decoding Polish text

[pawelad]

Hi,
I'm connecting to GMail account on Python 3 and getting UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb3 in position 5: invalid start byte while trying to get messages via for uid, message in inbox.messages(unread=True):.

The value at hand is b'Zosta\xb3 w\xb3\xb1czony dost\xeap dla mniej bezpiecznych aplikacji'. and from what I can tell is encoded in ISO 8859-2 instead of UTF-8.

Don't really know what to do here and what should be done in the code. Is there a way to make GMail 'give' us mails encoded with UTF-8? Should we maybe try a couple of encodings within str_decode?
I can do a PR after deciding what to do here.

Cheers,
Paweł