But I can’t decrypt the mails from my bank with the client. The bank’s certificate is installed.
I have installed the certificate generated by em Client in Thunderbird. Thunderbird has fetched the bank’s certificate itself and displays the mails.
For some mail recipients (especially public authorities), my PGP signature is displayed as incorrect. This does not happen when I send signed mails with Thunderbird.
If you have already done that, then suggest if you have a current active paid Pro or Personal version, go to VIP support page and login and lodge a support ticket.