I'm fine with emails, and my p-doc uses them. As for your feelings of people disliking you, I wish I had some magic words to help you. I do think that all people have the feeling you've described to one degree or another. The best advice I can offer is to just notice the thoughts about being inadequate and continue to do what you need to do. And remember the wonderful Zen saying: "What you think of me is none of my business."