What Is an Email Retention Policy?

Businesses that manage employee email use an email retention policy to set how long they keep messages and attachments, where they store them, and when they delete them. The policy helps employees handle business records consistently and helps the organization meet applicable legal and regulatory requirements.

A policy should identify which messages to keep and set a retention period for them. It should also explain how to find those messages and when deletion must stop. The right schedule depends on the organization’s work and the rules that apply to its records. There is no single retention period for every business email.

What the policy covers #

An email retention policy applies to business messages and attachments in employee mailboxes or a central archive, a separate store for messages kept for later retrieval. It should explain how the organization groups messages and which tools it uses to store them. It should also identify who can access or delete messages.

For example, an organization might set separate schedules for routine scheduling messages and employee records, with another for customer contracts. A schedule should connect each category to a business or legal reason for keeping it, then specify when the retention period begins and what happens when it ends.

The policy also needs to address legal holds. A legal hold is an instruction to preserve relevant information when litigation is reasonably anticipated or underway. It pauses ordinary deletion for the records covered by the hold. Deleting relevant email after that point can lead to court sanctions under the circumstances described in Federal Rule of Civil Procedure 37(e).

Why retention periods vary #

Different laws and regulations apply to different organizations, records, and purposes. For example, financial firms face recordkeeping requirements for business communications, while privacy rules can limit how long personal data is kept. The FINRA email-retention overview describes requirements tied to the type of record and applicable securities rules. Because requirements can overlap or differ in scope, regulated organizations should confirm the schedule with qualified legal or compliance professionals.

Keeping every message forever increases the amount of information an organization must protect and search. Retained messages can also become relevant in litigation. Privacy rules such as the GDPR also require organizations to limit personal-data retention to what is necessary for the stated purpose, as summarized in this retention requirements overview.

Retention is different from backup #

An email archive keeps messages so people can retrieve them later for compliance checks or investigations. A backup is a copy intended to restore data after loss or damage; it may be overwritten on a rolling schedule and may not support searching messages across long periods. Relying on backups alone can make it difficult to locate and preserve specific records. Email archiving guidance explains this distinction.

A written policy also needs to match actual practices. If employees use chat or other communication channels for business, the organization should assess whether those records need similar capture and retention rules. The FINRA guidance emphasizes that covered business communications remain the firm’s responsibility even when an outside provider stores them.

Put the policy into practice #

Start by identifying the kinds of business messages the organization creates and the rules that apply to them. Assign a retention period and a responsible owner to each record category. Then configure email tools to archive, preserve, or delete messages according to those rules, with a way to suspend deletion for legal holds.

Document how employees should handle messages and how the organization checks whether they follow the rules. Review the schedule when laws change or business needs shift. A change to communication tools is another reason to review it. A written policy alone does not prove that employees handled messages as required.

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