How to send secure emails

Contact your local IT support team regarding installation of the Sikkermail (secure email) plug-in in Outlook. Please note that the secure email solution can only be used on Windows PCs.

NOTE! The security plug-in is only available in Danish and therefore the screenshots below are in Danish.


What is Sikker mail (secure email)?

Sikker mail (secure email) means that the email you send is encrypted and signed. Sikker mail is intended for sending emails which contain confidential information and sensitive personal data. The encryption ensures that only the recipient can read the email. If the email ends up in the wrong hands, it will be unreadable. The signature ensures that the sender is the person he/she claims to be, and that the content is the same as when it left the sender.

How to send a secure email from your own mailbox

This method is relevant for people who need to send secure emails from time to time. This solution makes it possible for you to send secure emails from your personal mailbox.

How to send a secure email from your own mailbox:

  1. Click ‘Ny mail’ (new email) and write your email as usual.
  2. Click ‘Send Sikkert’ (send securely) when you want to send the email. If the recipient also has a secure email solution, the email will be sent securely and any responses will also be sent securely back to your inbox. If the recipient does not have a secure email solution, go to step 3.




  3. If the recipient does not have a secure email solution, you must add the recipient’s mobile phone number in the ‘Mobilnummer’ field and click ‘OK’. The email will then be sent to a secure location on a server.



  4.  The recipient will now receive an SMS code and an email with a link which can be used to read the email. The recipient can respond securely to the email and can add files to the email response.  

    If relevant, you can send a link to this guide to the recipient: How to read and respond to secure emails from AU. 

How to send a secure email from a shared mailbox

If the people in your unit need to send secure emails frequently or more people work together and need to send secure emails, we recommend that you use a shared mailbox with a security certificate. You can use this shared mailbox to send and receive secure emails. It will also be possible for each person to send secure emails from his/her personal mailbox.

Your local IT support team can help set up a shared mailbox with a security certificate.  

How to send a secure email from a shared mailbox:

  1. Click ‘Ny mail’ (new email) and write your email as usual.
  2. When you want to send the email, you must check that you are sending the email from the shared mailbox with the security certificate, and then click ‘Send Sikkert’ (send securely). If the recipient also has a secure email solution, the email will be sent securely and any responses will also be sent securely back to your inbox. If the recipient does not have a secure email solution, go to step 3.




  3. If the recipient does not have a secure email solution, you must add the recipient’s mobile phone number in the ‘Mobilnummer’ field and click ‘OK’. The email will then be sent to a secure location on a server.

  4. The recipient will now receive an SMS code and an email with a link which can be used to read the email. The recipient can respond securely to the email and can add files to the email response. If relevant, you can send a link to this guide to the recipient: How to read and respond to secure emails from AU. 

How to send secure mail from a mac

Send secure mail is available for mac.

Please contact Support and request to be added to O365AddIn-Outlook-SikkerMail.

It can take a duration af 12 hours before the Secure Mail plugin is installed and you need to restart the PC. Please also check, under Settings i Outlook, that Send method is set to SecureMail and Mailbox

How to make the Send Secure Mail button visible in Outlook

On Windows, if the button for sending secure mails has disapeared, try restarting Outlook..

If the button is still missing you can try adding it through Outook Settings:
Go to File --> Options --> Add-ins

Here you see the list of add-ins in Outlook.
Select the "Go..." button and a new window will open

If Sikker@mail isn't checked, please do and select "OK"
The button should now be visible again.

Note: If Sikker@mail isn't listed, please contact your local support