S/MIME certificate validation problem

Help Fairphone 5
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1

Hi community,

I recently got an FP5 from my company. I use this in enterprise mode (privatespace and workspace).
I tried to install my S/MIME certificate, which was gernerated from ssl.com. The import was without problems but I can`t activate signing or encryption. When I look at the certificate details then I see that its tells me that the verification expired somehow. I have no error message.

Screenshot_20240529-094449
Screenshot_20240529-0944491224×2700 120 KB

How can I solve this problem?

UPDATE:
I got an new gernerated S/MIME certificate from ssl.com to ensure that nothing is wrong with the certificate. The problem is still there.

4

Hi MrShuffle and welcome to the community.

I’m no expert but did you check that the relative root certificate is pre-installed?

Root certs can be found by going to Settings > Security and privacy > More security and privacy > Encryption and credentials > Trusted credentials.

On my phone there are four roots from SSL but that’s no guarantee that the right one is among them. You can display details by tapping a certificate.

5

Recently there was a topic about a different S/MIME problem. I assume it won’t be a solution for you but over there the problem was that a certificate did not work in emclient but the same certificate did work in Fairmail.

So just as a cross check, could you try if it works in Fairmail (an open source client)? That may give a hint if it’s the cert or Outlook causing the trouble.