remember that email is asynchronous - it is not a live conversation like on the phone. one may write thoughtfully or carefully, or just dash off a quick message. I'm so used to using it for work and with family & friends. With T, it is not the same.

what is emailing your therapist like?
I'm in an HMO that provides secure email between members and all providers. The providers/their office staff are supposed to respond within 48 hr. So, I write my MD, PsychMD, cardiologist, my kids' docs, etc. It's very handy.
OldT - we used email as an extension of therapy. I am learning that this may have created dependency on him, and it allowed me to feed my obsessive thoughts about him. I would wait breathlessly for his responses.
NewT - email is not for therapy. If I'm experiencing difficult feelings, then she wants me to journal, or think thru it.

what do you say?
OldT - I commented on how a session helped me, or something that left me feeling unsettled. I asked questions, like "what did you mean when you said____?" or an observation about how I handled a situation IRL.
NewT - I only write her basic stuff, what should I be working on? or "Last session was great, thanks!".

what do they say?
OldT would do his best to give a thoughtful and careful response, here's what I meant, glad you felt connected last time, have you considered it like this?
He had a special setup that gave him extra time each day when he could write detailed responses.
NewT - one line "Thanks for the update" or "See you next time" she does not engage. On the rare occasion there is detailed response, it's often not ideal because she does not have time for a careful response.

how often is it?
OldT - almost every day, sometimes several per day.
NewT - maybe only one per week, or not at all.

and is it helpful?
OldT - I loved it and thought it was very helpful. But, in hindsight I am less sure it was helpful.
NewT - not meant to help. I'm in the habit now of storing up my questions for a session, since in person we can have the back and forth quickly that helps me understand her meaning.

Maybe start by talking in person about how phone calling rules may have changed? "I'm feeling uncomfortable about calling you lately"