I would check to see if T's email is confidential before sending anything. If she has communicated with you about scheduling before, there might be a blurb about confidentiality in her signature or at the very end of the email. Some will say that email is not confidential and sensitive communication should happen via phone message. Others will say that the email is confidential info and should be treated as such... I would look into that before sending details off to her...
I've left voice mails with this past T about things I could not bring up in session but wanted to talk about (she did not use email because it wasn't confidential). I also have printed stuff out to take to her. I have lots of trouble bringing certain stuff up in session, so giving T a heads-up about it is a way to make sure I don't chicken-out.
T prior to this one read a private blog I wrote to her in (she also did not have confidential email). She only read it during office hours though, and that was fine. If there was every anything that needed immediate addressing, I called. She had access to the blog outside of work, but she was never expected to look at it (actually, I never expected her to look at it more than once before our next session, but she grew to check it often as time wore on).