Mailock® Pro

Keep client email

exchanges safe

Secure email for web and desktop

Protect client data from interception and error. Encrypt emails and set recipient authentication challenges for access.

Professional man reading an encrypted email on a laptop

Send & receive

How it works

1. Send

Start a secure email from your desktop or web browser, choosing from a range of authentication challenges.

Secure Mailock send button in email client

2. Receive

Recipients receive a notification in their inbox and must pass your authentication challenge to unlock the message.

Enter the code screen to unlock your Mailock secure email

3. Reply

Replying is easy - recipients can use Mailock for desktop or web to keep sensitive messages and files secure.

Enter the code to unlock your Mailock secure email
Secure Mailock send button in email client
Enter the code screen to unlock your Mailock secure email
Enter the code to unlock your Mailock secure email


Make sure the right

person is reading

Set read challenges for recipients

  • SMS: Send a one-time code to your recipient's mobile device.
  • Q&A: Ask your recipient a question only they could correctly answer.
  • Unipass ID: Allow financial professionals to verify their ID using Unipass.
Mobile question and answer and SMS code challenges Mailock Pro

Secure replies

Share the power

to email securely

Recipients reply securely for free

It’s not enough to protect information one way. Mailock makes it easy for your recipients to read and reply. They’ll even get some free secure sends in case they need to deliver sensitive information to others.

A couple receiving an encrypted email and replying securely


Prevent data loss

with trigger words

Get ‘before you send’ alerts

We're only human - sometimes we don’t think twice before hitting 'send'. If an email contains any of your preset trigger words, Mailock won’t let you send it without confirming its security.

Mailock trigger word warning interface


Regulatory guidance

A secure email service that helps you to comply with UK data security regulations

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.


I just think about
it as being email.

It hasn’t changed the way we work. Email is how most of our clients want to communicate and Mailock acts as a second pair of eyes.

 Sam Whybrow  Director, Thanks Wealth Planning
A professional man on phone and laptop at the same time in his office


Secure your emails
without switching

Sign up to Mailock Pro to start securing messages and attachments using your existing email address and account.

Email icon


Compose secure emails from Windows Outlook or our secure browser app. Add your message and attachments then set your challenge.
Encryption icon


Your emails and attachments are secured with end-to-end AES-256 encryption - virtually impenetrable protection for sensitive data.

Message read icon


Verify untrusted contacts using a range of multi-factor authentication challenges including question-and-answer, SMS, and Unipass ID.

Magnifying glass icon


All message activity is recorded including opens and attachment downloads. Read notifications help senders to follow up at the right time.
Revoke icon


Revoke secure emails sent in error, even if they've already been opened - your recipients will lose access to retrieve them immediately.
Stars icon


Recipients can read and reply to messages for free using our secure browser app. Grow your network by empowering clients to engage.
Lightbulb icon


Catch sensitive emails before it's too late with custom trigger words. If they're included in a message, you'll be alerted to send it securely.

Branding icon


Customise the recipient journey with your company branding to foster a familiar, trusted user experience for your clients and partners.

Download the Mailock
Pro Data Sheet

Paragon Logo
Aegon Logo
Royal London logo
Origo logo
Equiniti EQ Logo
abrdn logo
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.

Professional male helping colleague to use secure email system

Pricing & plans

Compare plans

Find the right Mailock plan for your business.

Case studies

  Hear from our users

7 min read
MPA Financial Management
26 02 24

MPA Financial Management Uses Mailock to Support & Safeguard Clients

Learn how MPA Financial Management supports and safeguards clients at an affordable price, using Mailock secure email.

6 min read
Rapport financial strategists
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.

2 min read
Woman speaking to colleague in office about email security
22 02 23

Brearley Law Puts The Protection Of Client Data First With Mailock

Brearley Law prioritises client data protection with Mailock. Discover how they successfully increased cybersecurity and built trust with their clients.


FAQs, answered

What is Mailock Pro?

Mailock Pro is a secure email solution designed to protect client data through email encryption and authentication, ensuring compliance with email data protection regulations.

How does Mailock Pro secure emails?

Mailock Pro uses end-to-end AES-256 encryption to secure emails and attachments. It also offers multi-factor authentication options, such as SMS codes and security questions, to verify recipients.

Can recipients reply securely to Mailock Pro emails?

Yes, recipients can read and reply to secure messages for free using the Mailock secure browser app. They also get a few free secure sends to use as needed.

Is Mailock Pro compliant with data protection regulations?

Yes, Mailock Pro helps businesses comply with various data security regulations, such as GDPR, by encrypting personal information and providing proof-of-delivery for digital communications.

What happens if I send an email by mistake?

Mailock Pro allows you to revoke secure emails even after they've been opened, ensuring that sensitive information is not compromised.

How can I start using Mailock Pro?

You can start a 14-day free trial by visiting the Mailock Pro subscription page and signing up.