Configure Outlook (to sign automatically)
You can configure Outlook to send digitally signed and/or encrypted e-mails.
|These instructions were created using Outlook 2016 on Windows 10 (Latest update 23.04.2020).|
You should install your user (S/MIME or X.509) certificate in the certificate store of your Windows system before you begin the configuration of Outlook.
If you have used a browser other than the Internet Explorer when applying for the certificate, you should first export your user certificate and the RSA keypair into a .p12 file and then import this into your Windows certificate store.
If you do not own a certificate, you can apply for one at the DFN-PKI website. For more information please visit "Applying for User Certificate".
Configure Outlook to digitally sign outgoing e-mails
Choose stronger signature and encryption algorithms
Send a digitally signed e-mail (optional)
Verify the digital signature on a signed e-mail
Click on the signature icon.
Note: a digital signature is not the footer Outlook allows you to append at the end of each e-mail (e.g. Name, Department, Address, Phone, etc).
A digitally signed e-mail (and the corresponding digital signature) is based on cryptographic algorithms and allows the recipient of your e-mail to:
If you click on "Details" you get to see more crypto stuff, e.g. message hash value.
We choose to stay under "Allgemein" and have a closer look at the sender's user certificate.
This is the certificate chain:
For more information: