Mailock® Enterprise

Protect critical

customer comms

Your secure email gateway (SEG)

Exchange sensitive information safely and compliantly. Use our secure email gateway for friction-free customer comms.

Female professional smiling in office using laptop to secure encrypted emails with Mailock

Enterprise-Grade Email

Prevent the worst,

communicate better

Engage your customers safely

The Mailock Enterprise secure email gateway enables sensitive email exchanges between your business and your customers.

  • Integrate with your mail flow
  • Support a range of ID challenges
  • Create a branded recipient experience
Secure email with company branding user interface

How it works

1. Receive

Recipients get a notification email telling them they have a secure message waiting to be opened.

Receiving a Mailock secure email as a customer

2. Identify

They'll click ‘Open’ on the notification delivered to their inbox then answer an identity challenge (or if they're trusted, they can read right away).

Securing a customer email using SMS authentication

3. Reply

If people need to reply to a secure message, they can use Mailock to compose, attach, and reply using their existing email address and account.

Secure compose interface using the Mailock web app
Receiving a Mailock secure email as a customer
Securing a customer email using SMS authentication
Secure compose interface using the Mailock web app


Encrypt data

Protect against interception

Deliver sensitive information using end-to-end email encryption to prevent interception and protect customers from fraud.

Secure enterprise email gateway being used to deliver customer information


Identify recipients

Prevent unauthorised access

Set recipient authentication challenges to guarantee delivery to the right people and guard data in the event of human error.

Read an enterprise secure email by passing multi-factor authentication


Drive engagement

Empower customers to reply

Recipients can read messages, download attachments, and reply securely for free by connecting their existing email address.

Customer replying safely to secure email sent from customer services
Challenge options:
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Mailock challenges

Use Mailock's toolbox of user accessible challenges, including question-and-answer, SMS (and ID&V - coming soon).
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Third-party integrations

Connect with third-party authentication applications such as Unipass to verify identity in a way that fits your market.
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Use the Mailock API to set challenges using your Customer Relationship Management (CRM) platform data.


Guarantee email
data compliance

Protect data in line with regulatory guidance using the most secure email gateway.

Encrypt personal information (GDPR)

The Information Commissioner's Office (ICO) and Financial Conduct Authority (FCA) require businesses to encrypt sensitive data transferred digitally. The ICO can levy fines of up to £17m for non-compliance (or 4% of turnover).

Record proof-of-delivery (MIFID II)

All businesses should record digital communications and retain proof-of-delivery to align with ICO guidance. Proof-of-receipt is also required by the FCA for certain types of document (e.g., KIDs).

Protect customers (Consumer Duty)

Are you encouraging customers to send their information into your business unsecured? The FCA's Consumer Duty is a mandate to provide easy-to-understand communications and protect customers from financial harm.


It shows we take protecting customers' private data seriously,

with an industry standard platform they can use to send and receive free-of-charge.

 John McGlynn  Royal London
Male professional looking at laptop with secure email platform on


Advanced security

Our secure email gateway gives you the tools to protect all your sensitive email exchanges.

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Email encryption

Secure sensitive emails and attachments by obscuring data with military strength AES-256 encryption.

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M365 integration

Integrate Mailock with your M365 exchange alongside your CRM, antivirus, and server-side signature.

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Recipient authentication

Set recipient authentication challenges including email verification, SMS, question-and-answer, and Unipass ID.
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Robust revocation

Messages can be revoked at user or admin level, immediately restricting access to lock down a breach.

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Error prevention

Prompt users to send a message securely if it contains particular preset or custom keywords (‘trigger words’).

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Flexible configuration

Configure how encryption is initiated for sensitive emails (e.g., Outlook add-in, keywords, rule-based, automated).
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Secure audit trails

Timestamped audit trails track message opens, clicks, and downloads for proof-of-delivery and compliance.

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Advanced interfacing

Tap into the Mailock API for revocation, audit trails, MI/BI analytics, and advanced automation controls.
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Scalable volume

Deliver at scale with Mailock Automated, an optional add-on for batched and bulk delivery using automation.

Download the Mailock
Enterprise Data Sheet


Deploy your way

Our secure email gateway gives you the tools to protect all your sensitive email exchanges.

Mailock customer solutions architect helping client to deploy Mailock
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Managed service

Use our managed cloud appliance or host it in your own infrastructure with our support.

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Storage location

Store your encrypted data in our default EU location or on your dedicated server.

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Customise Mailock's apps and recipient notifications for a branded experience.

Branding icon


Configure your gateway to support multiple, separate brands - for you or your clients.

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Choose between single or multi-tenant plans to suit your budget and usage volume.

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Encryption triggers

Trigger the encryption process manually or using automation at scale.

Head of compliance looking and smiling in office

Use Case

Boost compliance

Secure email communications are crucial for compliance with regulatory guidance. Fulfil your obligations to protect sensitive data.

Relationships director thinking about customer experience

Use Case

Drive engagement

Another click is another point of friction. Mailock boosts open and response rates by delivering confidential information to customers' inboxes.

We have no outbound email security

Use Case

Strengthen security

If you can't securely exchange emails with clients, it's likely sensitive data is being compromised. Strengthen your outbound email security with Mailock.

IT team looking at demo email security software

Pricing & plans

Compare plans

Find the right secure email gateway package for your business.

Case studies

  Hear from our users

1 min read
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28 10 21

Why Mailock And Paragon Were Chosen By HSBC Security Services

HSBC Security Services selects Beyond Encryption’s (BE) market leading email security system as a key part of a large-scale transformation programme.

1 min read
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08 01 24

Why EQ Chose Mailock To Drive Engagement In The Pensions Market

We spoke to Jordan Hindley at EQ Group (Equiniti), Solution Owner For Wealth, Life and Pensions, on why they chose Mailock for secure customer engagement.

6 min read
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05 05 23

Boosting Security And Engagement At Rapport Financial Strategists

Rapport Financial Strategists improved the security and effectiveness of their client communications at an affordable price, using Mailock secure email.