What is a 'detachment' email?

Seems to me that if you are sending your S an email about how your are detaching, it is, by definition, not detachment.

BITS
Denver


M 43
X 38
T 13
W moves out of home 11/2010
Roller coaster from hell 2/2011-5/2012
I request divorce 5/2012
W moves home 6/2012
Good time 7/2012 - 1/2015
I leave 3/2016
process of divorce