[MlMt] Problem with GPG encryption

[Benny Kjær Nielsen]

On 27 Sep 2017, at 22:00, Robert Goldman wrote:

> Whenever I try to send a message with GPG encryption, I get an 
> "OpenPGP encryption failed dialog box."  The horrible error message (I 
> know -- this is GPG's fault, not MailMate's!) looks like this:

The fact that I chose to just pass on the error messages to the user 
shows that I did not dare to try to “translate” them into something 
more comprehensible :)

> But the trust level on my recipient's key is 5 and mine is 6.  So why 
> does this fail?

You need to sign the key, e.g., using the “GPG Keychain” application 
or `gpg2`. This is not always necessary though. OpenPGP is based on a 
“web of trust” and there are other ways that `gpg2` might determine 
that a key is valid. The details can be found in the “Using trust to 
validate keys” on [this 
page](https://www.gnupg.org/gph/en/manual/x334.html).

I don't claim to understand the details of “trust” and 
“validity” and I often find it confusing myself. Luckily (for me), 
all this really happens outside of MailMate. If you want to debug how 
MailMate uses `gpg2` then you can see how it's used by enabling the 
`MmDebugSecurity` hidden preference and launching MailMate from a 
Terminal window. You should be able to simply copy/paste the `gpg2` 
command and the arguments provided by MailMate if you want to do what 
MailMate does directly on the command line.

I hope this helps.

-- 
Benny
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freron.com/pipermail/mailmate/attachments/20170928/667e8860/attachment.html>