I haven't started T yet (first appointment is Tuesday), but the T I am seeing already emailed me to confirm the appointment and asked if I had any questions, so I am assuming she is open to communicating through email. So far, I have kept my questions basic (like do I need to bring anything with me and stuff like that). I don't want to get too detailed before meeting her and knowing if I can trust her or not. But, I like the availability to email her (at least so far) as I often forget to say things/ask things on the phone or in person.