Most people assume their emails at work are private. Those people are wrong. There are very few laws that protect you from email snooping at work, and most are pretty worthless and weak. That means you should assume your employer is monitoring your email.
If you get funny emails that are in bad taste, don’t forward them. Don’t write your lawyer on your work email. And for heaven’s sake, don’t send love notes to co-workers. Your rule of thumb should be, if you don’t want it on the front page of the company newsletter, don’t email it at work.
What is your email policy at work? What rules have you set on yourself so that you stay clear of any problems?