Forcibly closed by the remote host

First post, so a big HI to all!

I have been using eM for a couple of weeks now, with Gmail, and all worked fine.

Just recently, an error has crept in whereby when I start eM, I get an error message that says that eM can’t connect to the Gmail server.  If I ignore it, wait a few seconds, this error goes away and eM happily connects and syncs.

When looking at the log file associated with the error, the import part seems to be this:

10:08:38 (Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.)

I know this suggests the problem is further down the line than eM itself, but has anyone come across this before?

To reiterate, this problem only persists for  a few seconds after I open eM, but it is annoying.

Thanks in advance!