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.
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.
Step-by-step
How it works
1. Compose
Send a secure email from Outlook or the Mailock web app, with attachments included.
2. Encrypt
Mailock applies AES-256 encryption and a unique encryption key for the message.
3. Control access
Add recipient authentication when needed, and track access for confirmation of delivery and follow-up.
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.
AES-256 encryption
Protect emails and attachments with AES-256 encryption - a standard for safeguarding sensitive data.
Unique encryption keys
Encrypted connections
Policy-driven encryption
Secure replies
Authenticated access
Deployment & fit
Built to fit your processes
Pro
For professionals and teams
Start sending encrypted email from Outlook or your browser, without changing how you communicate day to day.
Enterprise
For high-volume contact
Use the Mailock Secure Email Gateway to integrate secure delivery into your operational processes, with policy-driven controls.
Automated
For scaled digital delivery
Deliver customer comms at scale with automated secure email delivery, for statementing and bulk messaging.
Features > Encrypt
Email encryption
Protect your emails with advanced 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.
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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