One day after telling a colleague that one of my email providers has experienced problems only three times in the last ten years, there was, and still is, what they call a "major outage". What that means is that if you have sent me an email and not received a response, that's because I haven't yet received it. If you resend it to terry[at]terry-freedman.org.uk that should get to me with no trouble (I'm reluctant to say will get to me: look what happened the last time I prasied an email service).
Update on 2010-07-08 14:30 by Terry Freedman, Educational ICT Consultant
I think my ISP has sorted out their technical problems. My emails have started to flood in -- flood being the operative word. Oh no....! 
Not MORE email??!!