Well, I guess it's up to him if he chooses to retain a L. You have one, and so it's up to you whether you communicate directly with him or through your own L.
I had my L run some letters via me before she sent them to make sure the tone was what I wanted. Equally, XH and I did some liaison via email...but do remember, your comfort and future security are primary here.
Xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus