[Bug 75416] [kmail] doesn't display a signed message, where the key is unknown

[StefanPotyra]

Public bug reported:

Hi,

when I click on the attached mail, its text is neither shown in kmail,
nor can I mark it as read. Is most probably related to the fact, that
the mail is signed.

Sorry, but I dunno if that's a bug in kdepim itself, or anywhere below.

Side note: 
gpg -verify --verbose 1165575164.6848.wUi8Z 
gpg: ify: skipped: public key not found
gpg: 1165575164.6848.wUi8Z: encryption failed: public key not found
zsh: exit 2     gpg -verify --verbose 1165575164.6848.wUi8Z

** Affects: kdepim (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

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[kmail] doesn't display a signed message, where the key is unknown
https://launchpad.net/bugs/75416