signed attachments are not displayed in the webapp

When I receive an e-mail with an attached file with the extension .p7m in the message I see the symbol of the attachment but I can not open it. I attach the file in the ticket.thanks

What do you mean with ticket?

sorry the same message was sent to kopano support and I opened a ticket. But I have not yet received a solution.

If you halve already a support case open for this, I’ll close this one here up to prevent double work. Feel free to bump the support case if you did not yet get a response.