Instead of writing that email get off your keister and walk down the hall and talk to her. Or use the video camera on your computer (or get one) and have a Skype video conference. Or pick up the phone if that’s your only option
Let them see your face, hear your voice, see your body language. Look at theirs. Build the freaking relationship. Then you’ll be a fantastic communicator.
p.s. When using a video-conference tool, look at the camera when they’re talking. It’ll make it look like you’re paying attention. Oh, and pay attention. That helps too.