Mailock® For Outlook

Email encryption
for Outlook

Secure email add-in for Outlook

Protect your emails from unauthorised access and sender error, with our encryption add-in for Windows Outlook desktop. Encrypt, authenticate, and revoke with Mailock.

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Encrypt emails and attachments at the click of a button

Protect customer and client data with an email encryption add-in that plugs right into your Outlook for Windows desktop app.

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Write emails just as usual, natively within Outlook. Click the Mailock icon to make sure your message will be encrypted.
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Use two-factor authentication. Set Q&A or SMS code challenges to make sure only the right people can open your emails.

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Secure messages and attachments with AES-256 end-to-end encryption. Not even we could intercept what you're sending.

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Generate a full audit trail including every interaction with your message, including opens, file downloads, and recalls.

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Recall emails anytime, even if they've been read - your recipients will lose access to retrieve them.
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Recipients reply for free - empower your customers with an encrypted email thread directly to you.

2-Factor Authentication

Make sure the right person is reading

Set read challenges for recipients

  • SMS: Send a one-time code to your recipient's mobile phone or tablet.
  • Q&A: Ask your recipient a question only they could correctly answer.
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"It sits in my email, and I don’t think about it as being Mailock, I just think about it as being email."

Sam Whybrow Thanks Wealth Planning
Wealth planning meeting to discuss email encryption usage and savings


“Personal data shall be: processed in a manner that ensures appropriate security of the personal data, including protection against unauthorised or unlawful processing and against accidental loss, destruction or damage, using appropriate technical or organisational measures ('integrity and confidentiality').” — ICO, 2021


“An investment firm shall have sound security mechanisms in place to guarantee the security and authentication of the means of transfer of information, minimise the risk of data corruption and unauthorised access and to prevent information leakage maintaining the confidentiality of the data at all times.” — ESMA, 2021

ISO 27001

“You should use encrypted communication channels when transmitting personal data. You should have an encryption policy in place that governs how and when you implement encryption, and you should also train your staff in the use and importance of encryption. When storing or transmitting personal data, you should use encryption and ensure that your encryption solution meets current standards.” — ICO, 2021


Turn email into your greatest power

Transform communications, meet business goals, and make email a force for good.

woman explaining logistics cost savings in meeting

Save logistics costs

The financial services industry alone could save up to £1.3bn by reducing its paper output, while providing “huge environmental benefits.” 


Meet ESG Goals

Businesses with a strong environmental, social, and governance proposition achieve higher equity returns and reductions in bottom-line risk.


Reduce data risk

Emails sent to the wrong person are the #1 cause of data exposure. Don’t let colleagues lose sleep over inadvertent data loss - individuals can be liable.


Multilayer email security

Cybercrime is rising, but it's not the most common reason for data loss. Emailing the wrong person is the primary cause of incidents. That's why Mailock for Outlook doesn't just encrypt, it also covers messages in case of human error.

Human error

Ensure even emails sent to the wrong recipient remain secure. Use Full Revoke to recall emails and strip read access. Utilise 2-factor authentication to ensure only your intended recipients can open.


Fortify your business against bad actors. With military-grade AES-256 encryption, Mailock safeguards your confidential data on its digital journey as well as at rest on your mail server and in your recipients' inboxes.


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IT woman looking at company admin for outlook add in
man and woman training how to use the outlook encryption add-in

Mailock For Outlook

See our pricing plans

Find the plan that suits your business.

Download the Outlook Add-In Data Sheet