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GPGME always return GPG_ERR_INV_ENGINE, with GPG4WIN
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GPG4WIN includes only gpg2.exe.
GPGME search gpg.exe, not gpg2.exe.

As a result, GPGME return GPG_ERR_INV_ENGINE, on Windows.

I use Sylpheed (Mailer) on Windows. but, it disable PGP functions with GPG4WIN.
reason is "invalid engine" as mentioned above.


1.1.8 and later

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gpgme comes with gpg4win - use this version only.

You should also consider to use Claws-mail because CM has a better GnuPG
integration and best of all is part of gpg4win.

I discover patch for gpgme in gpg4win source. (patches/gpgme/01-gpg2.patch)
Claws-mail uses libgpgme-11.dll in gpg4win binary, which includes string

I recognize gpgme in gpg4win is official version (on Windows).
We will use this version. Thank you.

  1. Claws-mail is based on Sylpheed. but, it doesn't work my environment.
werner claimed this task.