Nasty emails

No. People are allowed to be insulting, crude, profance, etc. If there is a pattern of abusive emails, and/or they get threatening, then there may be a case for harassment, stalking, or a related claim. However, one or two emails, if they are "simply" foul and nasty, do not give rise to any legal claims.

A nonlegal suggestion: it may be possible to set your email system/program to not accept emails from this person. Or if someone is sending it from a work account, you could possibly contract the person's employer and point out what they are doing from their official work email.