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[Mathieu Trudel-Lapierre <mathieu.tl@xxxxxxxxx>]

It's unclear how to fix this, since it would need at least decoupling
the decryption from signature verification, which doesn't appear to be
so easy to do with just gpg - I couldn't figure it out. There's still a
bug open upstream though, so my suggestion would be to add as much
debugging information to that bug report so that someone can look into
the issue and try to fix it.

Note that there are already possible workarounds. One of which being to
manually download the public key for the user sending the email; since
the error will only show up if an encrypted email is sent and no public
key is available. It's also possible to send emails in different formats
(not pgp-mime) which will allow evolution to display the email properly.

To manually download public keys, you can start "seahorse" (the
Passwords and encryption keys application, search for keys by name or by
ID (with the ID provided in the gpg message), then use the import button
once the correct key is selected.

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https://bugs.launchpad.net/bugs/689271

Title:
  Evolution fails to decrypt GPG message if signature (not encryption)
  key is not available

Status in The Evolution Mail & Calendaring Tool:
  New
Status in “evolution” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: evolution

  It seems that the bug
  https://bugs.launchpad.net/ubuntu/+source/evolution/+bug/90339 has
  reappeared in evolution 2.30.3-1ubuntu7.1

  Actual results:

  1) I receive a GPG encrypted mail, sent to my public key. However, the
  mail is signed with a key not in my keyring.

  2) Evolution does not display the mail, instead it displays a red
  error text output from GPG, with a message that the public key used
  for the signature was not found.

  3) Result: I cannot read the mail using Evolution. However, I am able
  to read the mail on the command line by using `gpg --decrypt` -- it
  shows a warning about missing signature key, but also shows the mail
  body.

  Expected results:
  Evolution should show the mail body, plus a broken "seal" at the bottom indicating that the signature public key was not found.

  Does this happen every time?
  Yes.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: evolution 2.30.3-1ubuntu7.1
  ProcVersionSignature: Ubuntu 2.6.35-23.41-generic 2.6.35.7
  Uname: Linux 2.6.35-23-generic x86_64
  NonfreeKernelModules: ath9k nvidia mac80211 ath9k_common ath9k_hw ath cfg80211 compat
  Architecture: amd64
  Date: Sun Dec 12 15:13:56 2010
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcEnviron:
   PATH=(custom, user)
   LANG=fi_FI.UTF-8
   SHELL=/bin/bash
  SourcePackage: evolution

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