Mailock® Free

Free secure email
for a safer world

Exchange private information safely

Exchange confidential information over email, easily and securely. Protect messages and attachments with advanced encryption and authentication.

Man in office securing email and smiling with a coffee cup (1)

Secure email
on any device

No need to switch email providers

Send secure emails and attachments from Windows Outlook or the web. Securely exchange data without leaving your inbox.

  • End-to-end email encryption
  • Q&A ID authentication
  • Recipients reply free
People in office encrypting emails

Always hit your mark

Reach the right people, only

Verify your recipients' identity before they can open your secure email. Use a challenge question - a question they must correctly answer to gain access.

  • Comply with regulatory guidance
  • Prevent unauthorised access
  • Protect personal information
Man in office encryption email (new free page)

Better businesses, happier customers

Couple receiving secure email
Protect data

Protect data

Are your emails confidential? Mailock uses end-to-end encryption to prevent email interception.

Prevent misfires

Reduce admin

No need to post your document to get confirmation of delivery. Mailock read receipts have you covered.

Prevent misfires

Prevent misfires

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

Save carbon

Save carbon

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


Encrypt emails and attachments at the click of a button

Protect data and maintain compliance with secure email encryption and authentication for sensitive comms.



Send secure emails from Outlook Desktop or the web. Click the Mailock icon to compose an encrypted email and set an authentication method.


Select from a range of multi-factor authentication options. Set question and answer challenges to make sure only the right people open your emails.



Deliver emails and attachments with end-to-end AES-256 encryption - the NSA standard for classified data.



Recipients reply securely for free - empower customers with an encrypted channel to your business.
Professionals Standing In A Room Clapping For The Benefits Of Mailock Secure Email At Conference

Start free

Get started

Our free plan gives you unlimited replies and 5 secure sends each month.