All emails sent from AU's mail server are secured with encryption via a Force TLS (Transport Layer Security) solution. This also applies to emails sent via smtp.uni.au.dk. This significantly enhances email security.
In most cases, you can simply use your regular AU mail when sending emails to external recipients, but in some cases you still need to use the Sikker@mail solution.
Find out when below.
Confidential data such as:
Confidential data, if it concerns:
Sensitive data such as:
If you are a system owner or researcher who processes sensitive data, you still need to conduct a risk assessment for how you exchange data. Read more about risk assessment.
If you work with data that cannot be sent via regular email or if Force TLS does not meet your needs, you should use Sikker@mail.
With Sikker@mail, you can send confidential information and sensitive personal data via email. Sikker@mail encrypts and signs your email. Learn more here.
In rare cases, emails may be rejected by the recipient's email system if it does not support Force TLS encryption.
When this happens, you will receive a Non-Delivery Report (NDR) as shown below. You then have the option of resending the email, but with the addition of one of the following tags in the subject field. The email will then be sent without TLS encryption.
Tags:
We encourage you to use these tags only when absolutely necessary, as TLS encryption provides the highest level of security.
Please note that sending public data is only permitted if TLS is not used.
If a receiver does not support Force TLS, the following error message is received. See above how to send without TLS.
451 5.7.3 STARTTLS is required to send mail