Mailock® Free
Free secure email
for a safer world
Exchange private information safely
Reply to secure emails you receive from premium users and send 5 encrypted emails to new contacts each month.

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.

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.
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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.)


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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.

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.

Free secure email
No need to switch
your email account
Free secure email on any device
Secure confidential emails and attachments using our Windows Outlook add-in or the Mailock browser app.
- End-to-end email encryption
- Q&A recipient authentication
- Free secure reply for recipients
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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


Protect data
Are your emails confidential? Mailock uses end-to-end encryption to prevent email interception by cyber criminals.
Reduce admin
No need to post a document to get proof-of-delivery. Mailock tells you when your secure emails get opened.
Prevent misfires
Secure messages and attachments with a challenge question so only the intended recipients can gain access.
Save carbon
Why waste paper when you can send documents faster, more efficiently, and more securely with Mailock?
Testimonial
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.
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Features
Encrypt emails and attachments at the click of a button
Securely send confidential information by email, for free. Keep your data private.
Compose
Encrypt
Deliver emails and attachments with end-to-end AES-256 encryption - the NSA standard for classified data.
Challenge
Email misfires are the top cause of data loss. Set challenges so only the right people can open.
Empower
Download the Mailock
Free Plan Data Sheet
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Get started
Create your account
Our free plan gives you unlimited secure email replies and 5+ sends each month.
Case studies
Hear from our users

Boosting Security And Engagement At Rapport Financial Strategists
This case study shows how Rapport Financial Strategists improved the security and effectiveness of their client communications using Mailock secure email.

Brearley Law Puts The Protection Of Client Data First With Mailock
According to the most recent ICO statistics, the UK legal industry is responsible for 8% of total data breach incidents reported in the past year.