Electronic mail communications are a fact of life in 2017. There is no getting around this benefit and burden. Yet careless use of email devices and networks can risk loss of confidentiality and other privileges. This is especially the case when clients communicate with their lawyers using their employer-established email accounts on office computers or computers they share with others, including in some cases family members. That client may also store personal emails and information on a business or shared laptop, smartphone, or tablet. In each case, these involve risks to confidentiality and any attendant privilege that may be claimed for the electronic communications. The principal of client-lawyer confidentiality found in Rule 1.6 of the Colorado Rules of Professional Conduct is given effect by related bodies of law: the attorney-client privilege, the work-product doctrine and the rule of confidentiality established in professional ethics. The lawyer’s duty of confidentiality in Rule 1.6 is much broader than either the attorney-client privilege or the work-product doctrine. The confidentiality rule, for example, applies not only to matters communicated in confidence by the client but also to all information relating to the representation, whatever its source. A lawyer may not disclose such information except as authorized or required by the Rules of Professional Conduct or other law. Careless use of email communication by the lawyer or the client can result in the loss of attorney-privilege or work product protection relating to the information contained in those emails, such as when clients are using an employer's email to conduction the conversation, or is using the employer's equipment.. The rules require that the lawyer take reasonable efforts to prevent unauthorized access or disclosure of confidential communications, including obtaining informed consent from the client to forego certain security measures - meaning that the lawyer must explain the issues to the client and obtain the client's informed consent.