Now, it seems to be an issue from gmail side. This typically is an
indication that one of the following reasons listed below is affecting
your inbox: 1) You have too many concurrent connections/services synched
with this email address (Note: Every time you connect an inbox to a
service, whether it be a mail client, an online tool, or logging into a
webmail client, this counts as a connection. Under Google, the limit is
10 concurrent connections and some services can utilize multiple
concurrent c...