Question 1

What is business email encryption?

Accepted Answer

Business email encryption ensures that emails and their attachments can only be read by the intended recipient — even if intercepted in transit or accessed from an unauthorised device. There are two main types: (1) Transport Layer Security (TLS) — encrypts emails in transit between mail servers. (2) End-to-end encryption (E2EE) — encrypts the message content so only the recipient with the private key can decrypt it. Microsoft Purview Message Encryption (formerly Office 365 Message Encryption) provides a practical middle ground for business use — encrypting sensitive messages so they can only be opened via a secure portal.

Question 2

Do I need email encryption for GDPR compliance?

Accepted Answer

GDPR requires that personal data is protected with "appropriate technical measures" — and email encryption is specifically cited by the ICO as a recommended control for protecting personal data in transit. If you regularly email personal data (HR communications, client records, financial data), you should have email encryption in place. The ICO has issued fines for data breaches caused by unencrypted emails containing personal data. Coreitech configures Microsoft Purview Message Encryption and DLP policies to automatically encrypt emails containing sensitive data.

Question 3

What is Microsoft Purview Message Encryption?

Accepted Answer

Microsoft Purview Message Encryption (formerly Office 365 Message Encryption / OME) is Microsoft's email encryption solution included in Microsoft 365 Business Premium and higher plans. It allows you to send encrypted emails to any recipient (inside or outside your organisation) — recipients without a Microsoft account can access the message via a secure web portal after verifying their identity. Coreitech configures encryption policies, sensitivity labels, and DLP rules to automate encryption of sensitive content.

Question 4

What is email DLP (Data Loss Prevention)?

Accepted Answer

Email DLP (Data Loss Prevention) uses content inspection policies to detect and block (or encrypt) emails containing sensitive data — such as credit card numbers, NHS numbers, financial data, or confidential documents — before they leave your organisation. Microsoft 365 Business Premium includes Microsoft Purview DLP, which Coreitech configures with rules appropriate for your sector (e.g. PCI DSS for financial services, GDPR-focused rules for all businesses). DLP can block, quarantine, or automatically encrypt emails that match defined patterns.

Question 5

How much does email encryption cost?

Accepted Answer

Microsoft Purview Message Encryption is included in Microsoft 365 Business Premium (£18.60/user/month). Coreitech's configuration and management service starts from £3/user/month. This includes sensitivity label setup, encryption policy configuration, DLP rule deployment, and monthly review of quarantined and encrypted message reports.

EMAIL
ENCRYPTION
LONDON

Email encryption London — frequently asked questions

Protect sensitive emails today

EMAILENCRYPTIONLONDON

Email encryption London — frequently asked questions

Protect sensitive emails today

EMAIL
ENCRYPTION
LONDON