Update from Google:
The problem with Gmail should be resolved. We apologize for the inconvenience and thank you for your patience and continued support. Please rest assured that system reliability is a top priority at Google, and we are making continuous improvements to make our systems better.
This only affected IMAP connections to Gmail.
If you are still experiencing any issues, please reconnect your IMAP client.
Note to District Staff - the prefered method for accessing Gmail is through https://mail.google.com, not through IMAP (Stamp Mail).