I fucked myself with email in my first ever proper job. I described an NA meeting I went to which had ended in a massive punch up, and also going into a rather bitter rant about a larger than average lady who was particularly self righteous, stuffing chocolate into her face in a rather grotesque fashion (I was a lot less diplomatic about my words....). I think I implied that I would quite like it if she died horribly.
This email was read by my boss, the HR manager, some non-executive director (who was the nicest guy on the face of the planet - I could see the dissappointment etched onto his face through out the disciplinary). I also had to admit past problems with drugs. They let me keep my job, for about 8 months, then found a way to bin me, in the most bastardish fashion possible.
If your email was anything as bad as mine, I would probably find another job sooner rather than later...