How to Write a Corporate Email Security Policy

Technology stops most email threats, but people still make the final decisions: whether to click, whether to pay, whether to forward. A written email security policy sets clear expectations for everyone and turns good intentions into consistent habits.

Why your company needs one

• It gives staff clear rules instead of guesswork.
• It reduces the risk of fraud, data leaks and account compromise.
• It supports compliance with data protection laws.
• It provides a basis for training and for handling incidents.

What to include: a ready-to-use outline

1. Purpose and scope. Explain why the policy exists and who it covers: employees, contractors and anyone using a company mailbox.

2. Acceptable use. Company email is for business purposes. Set expectations on personal use, professional tone and prohibited content.

3. Account security.

• Strong, unique passwords that aren’t reused elsewhere.
• Two-factor authentication required on all accounts.
• Never share passwords or 2FA codes with anyone, including IT.
• Access only from approved countries; notify IT before travel.

4. Recognising and reporting threats. Describe common warning signs of phishing and fraud, and give one simple way to report suspicious messages. Make it clear that reporting is always welcome, even for false alarms.

5. Attachments and links. Don’t open unexpected attachments or enable macros on external documents. Verify unusual requests through a second channel.

6. Payments and sensitive requests. All requests to change bank details or make urgent payments must be verified by phone using a known number. No exceptions for senior staff.

7. Handling confidential data. Rules on sending personal or confidential information, double-checking recipients, using BCC for group mailings and never forwarding company mail to personal accounts.

8. Mobile devices and BYOD. Screen locks, updated software, the approved email app and immediate reporting of lost devices.

9. Email retention. How long emails are kept and when they should be archived or deleted, in line with legal requirements.

10. Incident response. What to do if you clicked a suspicious link, entered your password somewhere or sent data to the wrong person: report immediately, without fear of blame.

11. Joiners and leavers. How accounts are created, reviewed and closed, and how mailbox data is preserved when someone leaves.

12. Review and acknowledgement. The policy is reviewed annually, and every user confirms they have read it.

Tips for making the policy stick

• Keep it short and readable; link to detailed procedures if needed.
• Pair it with regular awareness training.
• Lead by example: executives should follow the same rules.
• Back the policy with technical controls so the safe path is the easy path.

Technology that enforces your policy

The best policies are supported by tools that make compliance automatic. Smardove helps by enforcing two-factor authentication, restricting logins to approved countries, filtering phishing and spam with SpamFoo’s AI-driven engine and scanning every attachment for viruses.