There are some things that you just can’t include in your work e-mail. One, your e-mail can be tracked or traced and even archived by the company, since technically, it is not your personal e-mail but theirs. Two, just common courtesy.

Keep confidential information a secret. Even if communication is internal, except when the communication has been approved, it is always wise to keep classified information (especially if it’s about a sensitve company project to which only a few people have access) to himself. Leaking of information could be traced to you and there could be dire consequences.

Any form of sexual content, regardless of whether you sent it to a good friend or not, can be grounds for a sexual harassment lawsuit. This inappropriate material can end up outside the organization through “forwarded” e-mails. If the e-mail is traced and found out that it comes from your company, then it’ll be bad news indeed.

Profanity and negative information about co-workers, and especially the bosses. With an e-mail, there is written and hard proof of your act. So if you are disgruntled about how you’re being treated, stop being acoward and make an appointment for a personal meeting with your boss and talk civilly about the issue.

Never use the company e-mail to sell goods or services that is not related to the company. Times can be tough, but if you need to do some moonlighting, then better use your personal e-mail account.