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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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.

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Step-by-step

How it works

1. Compose

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

Mailock button in the Outlook ribbon

2. Encrypt

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

Mailock Microsoft 365 encryption process

3. Control access

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

SMS challenge on Mailock message receipt
Mailock button in the Outlook ribbon
Mailock Microsoft 365 encryption process
SMS challenge on Mailock message receipt

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.

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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

Sending a mailock pro secure email

Pro

For professionals and teams

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

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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.

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Automated

For scaled digital delivery

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

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

Features > Encrypt

Email encryption

Protect your emails with advanced encryption

encryption

Mailock uses military-grade encryption to keep your sensitive information safe from unauthorised access.

AES-256 encryption

Your emails are protected with AES-256 ciphers - one of the strongest security methods used to protect critical data.

Unique encryption keys

Each email is protected with its own unique encryption key, so if one message is ever compromised, the rest remain secure.

Enterprise-level security

For enterprise use, Mailock provides a secure, easy-to-implement API key for the Mailock Secure Email Gateway.

This makes sure all communication between your systems and Mailock is encrypted and authenticated, providing robust protection.

Multi-factor authentication

Encryption is just the start - Mailock also confirms the recipient’s identity before they can access encrypted emails, adding an extra layer of protection.

Encrypted connections

All interactions with Mailock - whether on the website or through the API - are encrypted to make sure connections remain secure.

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Plans & pricing

View plans

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

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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