Introduction

Email is the backbone of business communication—but it’s also vulnerable. Cybercriminals target emails to steal sensitive data. The solution? Encrypted emails. With Microsoft 365, encrypting emails is simple, effective, and essential for compliance.

What is Email Encryption?

Email encryption ensures that only the intended recipient can read your message—even if intercepted. It uses advanced cryptographic techniques to protect both the message and attachments.

Why Use Email Encryption?

• Protect Confidential Data: Prevent leaks of financial, personal, or business-critical information.
• Compliance: Meet global standards:

Home

https://www.iso.org/isoiec-27001-information-security.html

• Build Trust: Show clients and partners you take security seriously.

How Microsoft 365 Handles Encryption

Microsoft 365 uses Office Message Encryption (OME):

• Works across devices and platforms.
• Recipients authenticate via Microsoft account or one-time passcode.
• Attachments are encrypted too.

Step-by-Step: How to Send an Encrypted Email

1. Open Outlook and compose a new email.
2. Click Options > Encrypt.
3. Choose: Encrypt-Only – Basic encryption; Do Not Forward – Adds restrictions.
4. Send your email.

👉 https://support.microsoft.com/en-us/office/send-encrypted-messages-with-a-microsoft-365-personal-or-family-subscription-3521aa01-77e3-4cfd-8a13-299eb60b1957

Best Practices

• Encrypt any email containing sensitive data.
• Inform recipients about the process.
• Combine encryption with Multi-Factor Authentication (MFA).
• Regularly review your organisation’s security policies.

External Resources

https://learn.microsoft.com/en-us/microsoft-365/compliance

https://www.ncsc.gov.uk

Conclusion

Email encryption is a simple yet powerful way to protect your communications. With Microsoft 365, you can secure your messages in just a few clicks—helping you stay compliant and safeguard your reputation.

Ready to strengthen your security? Contact us today to learn more about penetration testing and cybersecurity solutions – Call 0117 200 1000

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Further reading:

Importance of strong passwords

Backup of Microsoft 365 external to inbuilt recovery

Privacy compliance and new 2025 laws