Please ensure that you still have
POP access for Gmail configured. If you do, then please
enable logging, reproduce this problem and then send your log file to us in a
Support Ticket. You can access the log file by clicking 'File --> Show User Data Folder' in the main PokerTracker 4 window - the file we need is the text file called 'PokerTracker4.log' that is in that folder.
In the meantime you can save the content of the email to a plain text file and import that using 'Get Hands From Disk'. If you save as a file make sure you save it as plain text (e.g. use Notepad) and that the format is exactly as the original (lines should not be split, etc).