Bug is with 5.5 (fresh 17.04) [5.5 not available in bugzilla kmail product version menu]
When a SMIME Msg is displayed and I click 'show details' I now get with 5.5:
Not enough information to check signature. <a href="kmail:showCertificate#gpgsm ### SMIME ### D07F02C9F576DC43">0xD07F02C9F576DC43</a>
AFAIU this is due to the commit
in bug 378320. (This bug is about the fact that msg is not detected as okay)
Git commit 5c4e1cde70627a4cb868092bf806aecaf86f582e by Montel Laurent.
Committed on 23/04/2017 at 06:27.
Pushed by mlaurent into branch 'Applications/17.04'.
Fix Bug 379066 - Bug in Grantlee template when viewing SMIME Msg: plain HTML code is shown
M +1 -1 messageviewer/src/messagepartthemes/default/templates/signedmessagepart.html