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Features > Encrypt

Email encryption for sensitive communications

Protect emails and attachments with AES-256 encryption and practical controls. Send securely from Outlook or the web, with options for professionals, teams, and enterprise delivery.

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Send encrypted emails that only the intended recipient can access, even after delivery
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Inbox delivery for sensitive information

Mailock secure email encrypts email content and attachments so sensitive information is protected in transit and at rest.

It’s designed for everyday communication - from professionals sending the occasional secure message to organisations delivering customer communications at scale.

Protect sensitive information with encrypted emails and recipient challenge questions before access

Step-by-step

How it works

1. Compose

Send a secure email from Outlook or the Mailock web app, with attachments included.

Send emails securely with encrypted attachments and a protected message experience for recipients

2. Encrypt

Mailock applies AES-256 encryption and a unique encryption key for the message.

Notify recipients with a branded secure email they can safely open and access

3. Control access

Add recipient authentication when needed, and track access for confirmation of delivery and follow-up.

Add challenge questions to verify recipient identity before granting access to encrypted emails
Send emails securely with encrypted attachments and a protected message experience for recipients
Notify recipients with a branded secure email they can safely open and access
Add challenge questions to verify recipient identity before granting access to encrypted emails

Security & Compliance

Protect data and support compliance

When you send personal or sensitive information, the risk is rarely just “hackers”. It’s misaddressing, forwarding, shared inboxes, and unclear handling. Mailock's email encryption helps reduce exposure by protecting content, and pairing it with identity checks where appropriate.

Support recipients with a simple, guided experience for accessing secure messages
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AES-256 encryption

Protect emails and attachments with AES-256 encryption - a standard for safeguarding sensitive data.

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Unique encryption keys

Each Mailock message has its own encryption key, helping limit risk if one message is ever compromised.
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Encrypted connections

Mailock encrypts connections across the web experience and integrations to help protect data in transit.
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Policy-driven encryption

Apply encryption consistently using policy-based rules and security alerts.
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Secure replies

Recipients can reply securely to keep sensitive conversations in one protected thread.
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Authenticated access

Optional recipient authentication to help reduce wrong-recipient access.
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Deployment & fit

Built to fit your processes

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Pro

For professionals and teams

Start sending encrypted email from Outlook or your browser, without changing how you communicate day to day.

Find out more
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Enterprise

For high-volume contact

Use the Mailock Secure Email Gateway to integrate secure delivery into your operational processes, with policy-driven controls.

Find out more
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Automated

For scaled digital delivery

Deliver customer comms at scale with automated secure email delivery, for statementing and bulk messaging.

Find out more
300K+
Users
2.5K+
Companies
3.5M+
Recipients
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Plans & pricing

View plans

Take a look at our plans to address your communications security challenges.

Find out more

Questions?

FAQs

What does email encryption protect against?

It helps protect email content and attachments from unauthorised access, particularly if messages are intercepted, forwarded, or accessed outside of intended workflows.

Is encryption enough if an email goes to the wrong person?

Encryption protects the content, but it does not automatically confirm identity. Adding recipient authentication, using Mailock, helps reduce the risk of the wrong person accessing a message.

Does encryption include attachments?

Yes - Mailock encrypts attachments alongside the email content.

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