Mailock® For Outlook

Secure your

Outlook emails

Email encryption add-in for Outlook

Encrypt sensitive messages and verify your recipients in Windows Outlook with the Mailock secure email add-in.

Male professional sending secure emails to his clients on laptop using mailock

Secure Outlook

emails in a *click*

Mailock brings email encryption and authentication to your Outlook inbox. Compose messages as normal, click the toggle to secure, and choose how to verify your recipients.

  • Send secure emails and replies
  • Prevent sending to the wrong person
  • Revoke access if there’s a breach
Outlook static GIF - sending a secure email

Outlook send & receive

How it works

1. Send

Select the secure toggle in your Outlook ribbon to start a secure email.

Mailock secure email button on the Outlook ribbon using add-in

2. Receive

Choose recipient verification with SMS, Q&A, or Unipass ID.

Enter the code to unlock your secure email in the Mailock Outlook add-in

3. Reply

Recipients can reply using Mailock in Outlook or on the web, keeping the conversation fully protected.

Secure read pane in Mailock web app after receiving a secure email in Outlook
Mailock secure email button on the Outlook ribbon using add-in
Enter the code to unlock your secure email in the Mailock Outlook add-in
Secure read pane in Mailock web app after receiving a secure email in Outlook

Security

Protect your

email exchanges

Secure emails and replies

Send encrypted emails and attachments with one click. Verify recipients to make sure only the right people can access your messages - even when they reply.

Couple sending a secure email reply

Prevention

Prevent mistakes

before they happen

Trigger sensitive data alerts

Catch risky emails with security alerts. If Mailock detects sensitive content, it’ll prompt you to send securely.

Trigger word warning in Outlook using the Mailock add-in

Compliance

Revoke you

can rely on

Lock emails sent in error

Unlike Outlook’s limited recall feature, Mailock’s message revoke works even after the email’s been opened - whether the recipient uses Outlook, Gmail, or any other provider.

Professional male in office using the Mailock Outlook add-in revoke function

Mailock vs Microsoft Message Encryption

See how Mailock stacks up against Microsoft’s built-in encryption for Outlook.


pricing-icon

Microsoft

Message Encryption

Basic protection for everyday emails
End-to-end encryption
Recipient authentication
Sensitive data alerts
Message audit trails
Message revoke
Read notifications
Engagement analytics
High volume delivery

Testimonial

Click the Mailock button and off you go!

The Mailock secure email toggle just sits there in Outlook - you click secured or unsecured, and off you go.

 Chris Pinkney   Business Director
Wealth planning meeting to discuss Outlook email encryption usage and savings
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Features

Key Features for Outlook

Email icon

Compose

Send secure emails from Outlook. Just click the Mailock icon and set recipient authentication.

Encryption icon

Encrypt

Deliver messages with end-to-end AES-256 encryption - protecting sensitive data in transit.

Data warning icon

Prevent

Get real-time security prompts based on predefined trigger words that suggest encryption before sending.
Customer identity icon

Challenge

Choose from multi-factor authentication methods like SMS, Q&A, or Unipass ID to verify recipients.

Magnifying glass

Track

Use the message tracker to see when secure emails are opened - ideal for follow-ups.
Revoke icon

Revoke

Take back access to messages at any time - even after they’ve been opened.

Download the Outlook
Add-In Data Sheet

250K+
Users
2.1K+
Companies
1.6M+
Recipients

More info

Learn more

Colleagues comparing plans

Pricing

Mailock pricing plans

Compare free and paid plans to find the right level of protection for your business.

Adviser using Mailock pro on phone to client

Mailock Pro

For professionals & teams

Get full access to secure email features, with controls built for regulated communication.

Financial adviser looking at screen in his office

Use Cases

For financial advisers

See how Mailock helps advisers protect client data and meet compliance requirements.

man helping colleague to use secure email system

Questions?

Let's talk

Book a demo to see Mailock in Outlook and ask any questions.

Questions?

FAQs, answered

What is Mailock for Outlook?

Mailock is a secure email add-in for the desktop version of Outlook on Windows. It lets you encrypt messages, authenticate recipients, and control access - all from your inbox.

How much does it cost?

You can get started with Mailock for free. Paid plans unlock additional features such as higher send limits, custom branding, and advanced controls for teams.

Can recipients reply without an account?

Yes - anyone can open and reply to your secure emails using Mailock, at no cost. No software or subscription is required on their end.

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