I have tried every country extension you could possibly think of, including .se, Per. but there is no go.
But after checking a bit, among other things with that facility Paintbrush posted, and I think it is related to the isp. I checked yesterday morning from home, and it was ok. Then I went away, and I will be away until Monday, unfortunately, so I'm using someone else's connection, which is not the same isp as mine. And of course, their support is not open during the weekend...

I've tried a computer in this house too, and no Google connection there either, so it's not my machine, and I'm well protected against virus.
But thanks for trying to help. I'll be on the phone with that isp first thing on Monday morning, you bet!
I hope nobody sends some urgent mail to me via my gmail address in the meantime