Mailock® Free

Free secure email

for a safer world

Email private information safely

Deliver information securely by encrypting your emails and authenticating your recipients. Create a free secure email account with Mailock, today.

  • 5 secure sends per month
  • Unlimited secure replies
Man in office using free secure email on laptop and smiling

Sending securely

How it works

1. Encrypt

Start a secure email from your desktop email client or your web browser. Set a challenge so only the right people gain access.

Start a secure email with a button in your email client

2. Connect

Recipients click ‘Open’ on the notification delivered to their inbox. They’ll answer your challenge in our browser app, or, if they're trusted, they’ll open and read right away.

Challenge question Mailock UX (1)

3. Engage

Our browser app works just like an email client. Recipients download attachments, compose, and reply. (Their replies can be auto-decrypted to your Outlook inbox.)

Secure read pane in Mailock web app
Start a secure email with a button in your email client
Challenge question Mailock UX (1)
Secure read pane in Mailock web app

Why Mailock?

Email freely without
risking your data

A digital world

In a digital age, it's more important than ever to prioritise online security. Email is a popular mode of communication for personal and professional purposes, but many email providers may not offer adequate protection against cyber threats.

couple at home using tablet

Open to threat

Most email providers lack essential security features, leaving users vulnerable to interception and hacks. By signing up for a secure email provider that offers email encryption and authentication features for free, you can get protected.

woman made an email mistake

Free secure email

No need to switch

your email account

Protect emails from any device

Secure confidential emails and attachments for free using our Windows Outlook add-in or the Mailock web browser app.

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

Q&A authentication

Double check your

recipient's identity

Reach the right people, only

Authenticate recipients when they open your emails. Set a question they’ll have to answer correctly for access.

  • Protect personal information
  • Prevent email interception
  • Comply with the GDPR
Mailock question and answer challenges on mobile
Older couple in kitchen using free secure email on laptop
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Protect data

Are your emails confidential? Mailock uses encryption and authentication to prevent email interception by cyber criminals.

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Reduce admin

No need to post a document to get proof-of-delivery. Mailock tells you when your secure emails get opened.

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Limit access

Secure messages and attachments with a challenge question so only the intended recipients can gain access.

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Save carbon

Why waste paper when you can send documents faster, more efficiently, and more securely with Mailock?


Safe & secure!

Fast - and good to know my details are safe. Easy for me to work out. When I spoke to customer service, they were very helpful.

 James  Mailock user
Man using free secure email on sofa in office


Encrypt emails and attachments at the click of a button

Keep your email data safe with a free secure email account.

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Secure emails using Windows Outlook or our secure browser app. Click the Mailock icon to get started.
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Deliver emails and attachments with end-to-end AES-256 encryption - the NSA standard for classified data.

Challenge icon


Email misfires are the top cause of data loss. Set question-and-answer challenges so only the right people gain access.

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Recipients reply securely for free - empower partners and clients by giving them a safe way to respond.

Download the Mailock
Free Account Data Sheet

Young male professional using laptop to send secure emails in office

Get started

Sign up today

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

Case studies

  Hear from our users

7 min read
MPA Financial Management
26 02 24

MPA Financial Management Uses Mailock to Support & Safeguard Clients

Learn how MPA Financial Management supports and safeguards clients at an affordable price, using Mailock secure email.

1 min read
How Westcoast Cloud Chose Mailock As Its Solution Of Choice For IT Resellers
31 01 24

How Westcoast Cloud Chose Mailock As The Solution For UK IT Resellers

We spoke to Mark Davies at Westcoast Cloud about how they chose Mailock to bring secure email to their base of IT reseller partners.

1 min read
Jordan Hindley interview with beyond encryption
08 01 24

Why EQ Chose Mailock To Drive Engagement In The Pensions Market

We spoke to Jordan Hindley at EQ Group (Equiniti), Solution Owner For Wealth, Life and Pensions, on why they chose Mailock for secure customer engagement.