Mailock® For Outlook

Secure your

Outlook emails

The email encryption Outlook add-in

Upgrade email for sensitive communications with the Mailock add-in for Windows Outlook. Encrypt data and authenticate recipients.

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

Security

Protect your

email exchanges

Secure emails and replies

Initiate encrypted email exchanges with a single click, authenticating recipients to guarantee a secure connection. Safeguard messages and attachments on delivery and when your recipients reply.

Email recipient authentication challenges on smartphone for message sent in Outlook

Prevention

Stop email mistakes

before it's too late

Trigger sensitive data alerts

Avoid the most common type of data breach - sending an email to the wrong people. If Mailock finds sensitive data, it will ask you to confirm its security before sending.

Trigger word warning in Outlook using the Mailock add-in

Compliance

Revoke you

can rely on

Lock emails sent in error

Outlook’s native email recall is limited. Comply with regulatory guidance on locking down sensitive data during a breach. Mailock gives you unilateral message revoke that works every time.

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

Compared

pricing-icon

Outlook

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

We can send and receive our client information safely. That's important.

Mailock removes a lot of the risk and GDPR concern around dealing with everyone’s favourite communication method - email.

Rob Hastings Harwell Finance
Wealth planning meeting to discuss Outlook email encryption usage and savings
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Features

The best Outlook add-in for email risk

Encrypt confidential emails and authenticate recipients with our secure email encryption add-in for Windows Outlook.

Email icon

Compose

Send secure emails from Windows Outlook. Click the Mailock icon to compose an encrypted email and set your recipient authentication.

Encryption icon

Encrypt

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

Data warning icon

Prevent

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.
Customer identity icon

Challenge

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

Read notification icon

Monitor

Read notifications and message analytics tell you when your secure mails are opened, so you can follow up at the right time.
Lightbulb icon

Engage

Recipients reply securely for free. They'll also get some free sends. Empower clients with an encrypted thread to your business.
Magnifying glass

Audit

The sent message tracker provides an auditable record of all your secure emails, detailing if and when they were accessed.
Revoke icon

Revoke

Revoke secure emails even if they've been opened, regardless of whether your recipient is using Outlook, Gmail, or another provider.

Download the Outlook
Add-In Data Sheet

Outlook send & receive

How it works

1. Send

Start a secure email with the Mailock Outlook add-in, choosing from a range of authentication challenges.

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

2. Receive

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

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

3. Reply

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

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
180K+
Users
2K+
Companies
1M+
Recipients
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Take the next step

Ready to get started?

Take a look at our plans for personal users and businesses to find the right fit for you.

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Questions?

FAQs, answered

What is Mailock for Outlook?

Mailock for Outlook is an email encryption add-in that allows you to secure your emails and authenticate recipients directly within your Outlook client on Windows.

How does Mailock ensure the security of my emails?

Mailock encrypts your emails and attachments with end-to-end encryption, ensuring that only the intended recipient can access the content. It also provides authentication challenges to verify the recipient's identity.

Can recipients reply securely to my encrypted emails?

Yes, recipients can reply securely using Mailock, even if they don't have a Mailock account. They can read and respond to your secure messages without any additional cost.

How do I revoke a sent email using Mailock?

If you need to revoke an email sent in error, Mailock allows you to do so even if the recipient has already opened it. This helps in containing potential data breaches.

What are trigger words and how do they work?

Trigger words are customisable keywords that, when detected in your email, prompt you to encrypt the message before sending. This feature helps prevent accidental exposure of sensitive information.

Is Mailock compliant with data protection regulations?

Yes, Mailock helps you comply with data protection regulations such as GDPR by encrypting personal information and providing audit trails for email interactions.