S/MIME signed emails

Hi forum,
I currently have a very strange situation.
I receive a couple of S/MIME signed emails on my private email account via Active Sync, which behave very strange. ( and its always only one company where this happens ).
If I click on the email in the hub and go to S/MIME Details, I get the message 'Details for this message will be available after the message id decoded. Please wait' and if I want to reply on the email, I get 'Could not display this message'.
Has anyone ever experienced such a thing ?
I already tried it with multiple othet S/MIME signed emails, and all of then work.
How can I narrow down the root cause for this ? In Outlook and thunderbird, the emails open and behave normal. Why not in the Hub on my Blackberry Passport and Classic ?

Regards
Volker

Do you use a personal digital certificate? (comodo)

Posted via CB10

Yes, I personally use such a certificate, but the sender uses an official corporate certificate.

Posted via CB10