Which of the following e-mail rules address security concerns? Select all that apply.

Rule 1: Be concise.
Rule 2: Answer all questions and anticipate new ones.
Rule 3: Check spelling and grammar.
Rule 4: Answer swiftly.
Rule 5: Don't attach files unless necessary.
Rule 6: Check for viruses.
Rule 7: Use proper formatting
Rule 8: Don't use ALL CAPS.
Rule 9: Avoid extensive punctuation.
Rule 10: Use priority settings only when necessary.
Rule 11: Include message threads.
Rule 12: Don't forward junk mail.
Rule 13: Don't e-mail confidential information.
Rule 14: Describe the message in the subject line.
Rule 15: Use emoticons and abbreviations sparingly.
Rule 16: Use salutations and signatures.

Viruses can breach security protocols and steal important and secure information from your computer. It is important to have all emails checked for viruses before opening. Also, junk mail can contain viruses. Sometimes junk mail begets more junk mail if it's opened so it's important to ignore all junk/spam mail.

E-mailing confidential information is a serious problem. Even if you are e-mailing within a company. E-mails are often stored, even if you think they are deleted. Certain entities must save a copy of every e-mail sent and received for seven years. Because of the freedom of information act, these e-mails are a matter of public record and can be subpoenaed if necessary. This would then release the confidential information into the public eye.