Mailock® Free

Free secure email

For individual light users

Send information securely by encrypting your emails and authenticating recipients.

  5 secure sends per month
 Unlimited secure replies

Man in office using free secure email on laptop and smiling

Free secure email

Encrypt emails

from any device

Easily secure sensitive emails and files at no cost with our Outlook add-in or web app.

  • End-to-end email encryption
  • Q&A recipient authentication
  • Free secure replies for recipients
The Mailock free secure email interface

Q&A authentication

Reach the right

people, only

Verify recipients by requiring them to answer a security question to access your emails.

  • Protect personal information
  • Prevent email interception
  • Comply with the GDPR
Mailock question and answer challenges on mobile

Testimonial

Perfect for exchanging sensitive documents

Sending documents back and forth is easy, and it's secure, unlike post, which can be intercepted or sent to the wrong address.

 Terry Cole   Financial Adviser
Financial adviser sending secure emails (1)
250K+
Users
2.1K+
Companies
1.6M+
Recipients
Young male professional using laptop to send secure emails in office

Get started

Create an account

Our free secure email account gives you unlimited secure message replies and a monthly allowance of secure sends.

Questions?

FAQs, answered

What is included in a Mailock Free account?

A Mailock Free account lets you send up to 5 secure emails per month and reply to secure emails without limits. It includes features such as end-to-end encryption, recipient authentication through email verification and challenge questions, and access via the Mailock web app or Outlook add-in.

How do I send a secure email using Mailock Free?

To send a secure email using Mailock Free, you need to register for a free account on the Mailock homepage. Once registered and signed in, select the 'Compose' option. You can then write your email and add a mandatory challenge question to authenticate the recipient. The system provides a panel to track how many secure emails you have left to send for the month.

What are the benefits of upgrading to Mailock Pro?

Upgrading to Mailock Pro offers several key benefits including unlimited secure email sends, the ability to protect emails with an SMS challenge, email revocation, advanced audit features, and customised company branding on emails. Additionally, Mailock Pro provides enhanced security features such as misdirected email protection, message expiry extended to 365 days, and shared email access across Mailock accounts within your company.

Key Concepts

3 min read
Colleagues looking at laptop and smiling in office
Key Concepts
27 06 25

How to Send a Secure Email (Encryption Options, Passwords, & MFA)

Learn how to send a secure email using TLS, encrypted files, or end-to-end email tools like Mailock. Keep messages private and compliant.

8 min read
Male consumer using his smartphone outside
Key Concepts
25 06 25

What Is Encryption? A Simple Guide for UK Businesses and Consumers

Encryption protects sensitive data by scrambling it into unreadable code. Learn what it is, how it works, and why it matters for security and trust.

7 min read
Female professional using TLS encryption on her smartphone outside the building
Key Concepts
24 01 25

TLS Email Encryption, Explained

Learn the essentials of TLS email encryption, its benefits, limitations, and how to implement it effectively for secure email communication.