Hey. I had a similar situation. I had an old p-doc who gave me her email. I moved and emailed her. No response. I tried again. No response. Then I sent a final email .... No response.

My final email thanked her again and updated her on my new situation. I figured if she ever wanted to respond, she knows where I am....

I had to move on. It hurt, especially because she said I could email. I decided it was hurting me more to keep trying to contact her than to move on.