Further to this response, it appears ComCast are blocking our email again, with no explanation.
I have contacted ComCast and asked this to be investigated, but it is a waiting game now for them to process my request.
You are not alone in having your email blocked.
One likely cause is recently another Comcast customer choose to report to ComCast that move notifications were spam, rather than turning them off, even though they continue to use the site as normal.
This is the cause of so much frustration - and starting to become a serious problem.
See Thread 184545