I think ONE letter would'tn constitude harassment no...
Ask SeeingRed about this one, she was charged with harassment by OW some time ago.. she's beating it easily...
Hey Melody,
Allen asked me to weigh in on harrassment. Don't know if I can help, but I'll try to ease your mind.
OW had me ARRESTED for sending 2 'harassing' emails to her at work, 'implying' she was having an affair with my husband.
When I engaged a lawyer and showed him the text message history (1,000/mth back and forth) and the Victoria's Secret invoices WS sent using his work address and her home address, my lawyer LAUGHED for 10 minutes and said that OW was either an idiot or had "the balls of a bull." I told her she was both and was also like a bull in a china shop!
Anyway, check with your lawyer, but I don't think 1 email constitutes a harrassment pattern. Here's what I'm reading online at LetsWrap.com: "Harassment is extremely frustrating to deal with, and can be difficult to prove in court."
Hope that helps.
Sounds like your WH is just ticked that you're spreading his secret. But you know, if he didn't cheat, NONE of this would have happened...