Mailock® Enterprise

Secure email
for enterprise

Company-wide data loss prevention

Deploy our secure email and document encryption to your on-premise or cloud mail server. Protect valuable comms. Encrypt, engage, and gain intel with Mailock.

woman smiling in office using email encryption software

Key Features

Secure emails and attachments

Our award-winning email gateway sits on your mail server or in the cloud, encrypting all your confidential communications.

AES-256 encrypted

AES-256 encrypted

Encrypt emails sent from your integrated mail server with award-winning AES-256 data encryption.

ICO Compliant

ICO compliant

Record timestamped audit trails of all message activity. ISO 27001 guidance says auditable comms is essential.

Zero Friction

Zero friction

Deploy alongside your CRM, antivirus, server-side signature, and data loss prevention (DLP).

Policy Adaptable

Policy adaptable

Set up custom encryption triggers and user alerts to tailor Mailock to your business' infosec priorities.

Fully Configurable

Fully configurable

Centrally configure how encryption is initiated by system users (manual, rule-based, or automated).
Flexible Control

Flexible control

Use the Mailock API for revocation, audit trails, MI/BI analytics, batched and automated encryption.

How it works


1. Encrypt

Start an encrypted message with a button in your email client, or use company-wide encryption rules to route all messages containing sensitive information through the Mailock network.


2. Connect

Recipients click ‘Open’ on the digital envelope delivered to their inbox to start the Mailock in-browser app. You can set challenges to verify their identity, or allow them to decrypt and read right away.


3. Engage

Our browser app works just like an email client. Recipients download files, compose, attach, and reply. When you receive their replies and attachments, they are automatically decrypted into your inbox.


Read and reply

Empower your customers

Recipients read and reply free

Empower customers to respond, with the knowledge that their data is secure. Mailock® drives engagement - 60% of messages are opened the same day they’re sent.

customer sitting in living room on floor looking at tablet

Gain intelligence

Monitor engagement

Leverage BI/MI analytics

Tap into the Mailock API for usage and engagement analytics. Surface key insights such as customer response times and download rates.

Man sitting at computer at night smiling-1

Maintain compliance

Prevent data loss

Use custom security profiling

Every company has a different profile for what should be considered sensitive information. With Mailock, you can customise the preset filters for the kinds of information that trigger an email to be encrypted.

IT team looking at secure email solution


74% of data breaches happen by email

ICO Data Security & Incident Trends Q2 2021

"It's a no-brainer. It’s the ability to send information quickly, easily, and it adds credibility to our proposition. That’s important."

Ben Allen The Right Mortgage
Manager in office with two women talking about cyber security


Transform your communications

Make email a force for good, meet your goals, and reduce your costs while you're at it.

people cleaning litter to reach ESG company goals

Save paper

Strengthen your environmental, social, and governance proposition. Businesses with strong ESG goals achieve higher equity returns and reductions in bottom-line risk.

budget meeting with financial controller explaining cost cutting initiatives

Boost efficiency

Over 9.5 billion documents are sent in the UK each year, the vast majority by businesses. In the UK financial services industry alone, digitising print and post operations could save £1.3 bn.

man stressed at sending unsecured email to the wrong person

Protect data

Free your organisation from open-risk email. Protect messages and attachments from cyber threat and human error. Exchange documents securely with customers and keep their data safe.


Bilateral protection

Cybercrime is rising, but it's not the most common cause of data loss. Sending an email to the wrong person is the number one source of incidents. That's why Mailock doesn't just encrypt, it also covers messages in case of human error.

Human error

Protect all emails that match the custom profile for what your business considers to be sensitive information. Ensure emails sent to the wrong recipient remain secure by giving users the power to strip access.
Man sending email to the wrong person on laptop at conference while busy

Cyber threat

Fortify your comms against bad actors, with military-grade AES-256 encryption. Mailock safeguards your confidential data on its journey and at rest on your mail server and in your recipients' inboxes.

IT expert standing by servers in corporate office configuring email security
Man sending email to the wrong person on laptop at conference while busy
IT expert standing by servers in corporate office configuring email security

M365 Integration

Outbound M365 security

Enhance Microsoft 365 with the capability to encrypt emails and documents sent to external recipients. Grant secure access with two-factor authentication. Mailock adds an additional layer of protection and functionality:
  • Two-factor recipient authentication
  • Full message and attachment revoke
    (regardless of receiving email client)
  • Free encrypted replies (including
    document transfer) for recipients
  • Simple set up and deployment
IT professionals discussing integration


“Personal data shall be: processed in a manner that ensures appropriate security of the personal data, including protection against unauthorised or unlawful processing and against accidental loss, destruction or damage, using appropriate technical or organisational measures ('integrity and confidentiality').” — ICO, 2021


“An investment firm shall have sound security mechanisms in place to guarantee the security and authentication of the means of transfer of information, minimise the risk of data corruption and unauthorised access and to prevent information leakage maintaining the confidentiality of the data at all times.” — ESMA, 2021

ISO 27001

“You should use encrypted communication channels when transmitting personal data. You should have an encryption policy in place that governs how and when you implement encryption, and you should also train your staff in the use and importance of encryption. When storing or transmitting personal data, you should use encryption and ensure that your encryption solution meets current standards.” — ICO, 2021

IT team looking at demo email security software

Mailock Enterprise

Take the next step

See how our Mailock Enterprise gateway solution could help to protect your business and customers.

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Download the Mailock Enterprise Data Sheet