I tried to generate a S/MIME certificate from comodo.com. On my Mac it perfectly works. But I am unable to use it on iOS 7. This is what I did:
- generate certificate on Mac
- export certificate and private key in p12 format from keychain
- sent the p12 and the Comodo cert (COMODO Client Authentication and Secure Email CA.cer) via email to iphone
- import both certificates
- enable S/MIME in email client on iPhone
When I look into my Profiles (General > Profiles) I see the comodo certificate as TRUSTED (1) as well as my private cert (2) . But when I look into the S/MIME settings from the email account on iPhone it is NOT TRUSTED (3).
My emails got not signed / encrypted then.
What am I doing wrong? I am lost.