E-mail communications often end up in evidence during divorce litigation. As with all other prudent steps, such as closing joint bank accounts, getting credit cards in your own name, etc, protecting your e-mail accounts is a priority. If you don't you may find that your spouse downloads sensitive information, and a judge considers it admissible at trial. An even more secure approach might be to close the accounts entirely and start new ones. While recent cases in other jurisdictions have deemed that prying into a spouse's e-mail account is illegal, it doesn't necessarily mean your spouse will be charged with breaking the law by doing so here - every case has individual facts that are considered. Don't take the risk of revealing damaging information to the other side or making private things public.