Andrew Herbert retired from his role of Chairman Microsoft Research EMEA in September 2011 and his Microsoft email address is no longer active.
Any correspondence relating to Microsoft Research Cambridge, should be directed to lab Managing Director, Andrew Blake (via his assistant Gayle Hughes).
Any correspondence relating to Microsoft Innovation Centres in Aachen, Cairo & Israel, should be directed to Director of Innovation Centres, Tarek Elabbady.
If you need to correspond with Andrew Herbert directly regarding any personal matters, please contact his former executive assistant Angela Still, who will be able to connect you to him as appropriate.