Gmail already works with courrier of windows10 and it shows all notifications messages in information center on the traybar.
see the photo attached.

the code of http://fox.wikis.com/wc.dll?Wiki~GetPopEmail returns error as first photo above.it connect successfully but fails .

its not "bad connection" or "bad username" or "bad password" because there is no error at this step.
it fails exactly at:THIS.OCXSOCKET.SENDDATA(PCMSG+CRLF) with message protocole error...
i prefer over all a vfp code to solve this problem.

i found on Github a big old library in: https://github.com/ColiseoSoftware/ifox
it seems an old one implementing most common internet protocoles (smtp,pop3,...) ...to test.