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

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
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
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 encryption and authentication 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.
Limit access
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
Keep your email data safe with a free secure email account.
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 question-and-answer challenges so only the right people gain access.
Empower
Download the Mailock
Free Account Data Sheet
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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

Boosting Security And Engagement At Rapport Financial Strategists
Rapport Financial Strategists improved the security and effectiveness of their client communications at an affordable price, using Mailock secure email.

Brearley Law Puts The Protection Of Client Data First With Mailock
Brearley Law prioritises client data protection with Mailock. Discover how they successfully increased cybersecurity and built trust with their clients.