I emailed occasionally with my last T for almost a year after terminating paid therapy. It wasn't anything too special - sometimes I liked to send him some updates or write about whatever in similar ways I did during my actual therapy. I never felt that therapy did too much for me but I liked that guy and enjoyed the contact. He actually engaged in quite similar ways to how he did during my therapy, for a while... then the whole thing just gradually dissipated. We still mostly emailed about my mental health updates and life events, but a couple times also about vacations (for both of us) and, towards the end of the contact, he told me about a health issue he was dealing with, that he had surgery for it, and a little bit about his recovery. I never asked or even wanted to know about his personal life, he just volunteered the info (also did quite often during my paid sessions). It wasn't like friendship by any means, the closest comparison that comes to my mind is keeping in touch with some former work colleagues and mentors - nothing frequent or too personal or emotional. The contact stopped now >a year ago and I don't really miss it, even though I still think fondly of him, in spite of not thinking he was a great T for me. We had many shared interests and values though, really more like colleagues. It was only email after ending formal therapy and none of us had ever indicated we wanted anything in person, except keeping it open for me to go back to a formal session if I wanted.