Sounds harsh, but not unheard of
I know several very competent individuals who've been let go by big corporates (mostly investment banks, but not always) for *receiving* emails containing porny content. Which is a bit of a fail in terms of understanding how much control any user has over the sort of email they receive...
It'll be interesting to see how this plays out in terms of the appeal, especially the claim that more senior people regularly send out smut via mail...