S/MIME signed only mails are processed by Outlook and not GpgOL:
It works in vsd 3.3.7:
To reproduce:
- Write a smime signed only mail (e.g. from edward to ted)
- Preview the received mail (e.g. ted:INBOX/new smime signed only (04.09.26 10:13) -> outlook smime verification is displayed
Logs: (open mail)

