GPGMail: Error Message unusable key after Security Update

Denis's Avatar


02 Dec, 2017 08:47 AM

I installed the security update 2017-001 (

Now every time I write an new email I get this message in a modal dialogue window in non-deterministic intervals:

724D4301CDDF6099CD3DE3854E1FA09FDA612CCE: skipped: Unusable public key
gpg: [stdin]: encryption failed: Unusable public key

There should be no error message?

macOS           10.13.1     17B1003
GPG Suite       2017.1      2002    (4161887)
GPGMail         3.0b1       1244    (7f051cc)
GPG Keychain    1.4         1377    (3384573)
GPGServices     1.11.1      961     (d6060fa)
MacGPG2         2.2.0       893     (ab15b08)
GPGPreferences  2.1         977     (b1e419a)
Libmacgpg       0.8         819     (c8cf2e0)
pinentry        0.9.7       6       (6aeb033)
  1. Support Staff 1 Posted by Steve on 03 Dec, 2017 11:57 AM

    Steve's Avatar

    Hi Denis,

    welcome to the GPGTools support platform. Sorry you are having problems using GPG Suite.

    First, let's check if your key is ok:

    1. open GPG Keychain
    2. double click your sec/pub key
    3. create a screenshot of the key tab (⇧⌘4 + drag w mouse)
    4. create a screenshot of the subkey tab
    5. attach both screenshots to your discussion by visiting it in your browser

    Should your key have expired, please re-new the expiration date in the key tab.

    To renew the subkey, open the subkey tab, click the cogwheel and change the expiration date

    After that send a signed and encrypted test mail to yourself. Are you able to decrypt and verify the signature successfully?

    In case your key resides on the public key servers, don't forget to upload your updated key, so that the changes are reflected on the key servers.

    Best regards,

  2. 2 Posted by Denis on 03 Dec, 2017 12:52 PM

    Denis's Avatar

    Thank you Steve - you see me humiliated: I didn't update the expiry date of the subkey. Thank you very much for your response and sorry again for the hassle.

  3. Support Staff 3 Posted by Steve on 07 Dec, 2017 07:42 PM

    Steve's Avatar

    No problem at all.

    Glad, this is solved for you. I'm closing this discussion. Should you need further assistance or have questions you can re-open this discussion here or open a new one any time.


  4. Steve closed this discussion on 07 Dec, 2017 07:42 PM.

Comments are currently closed for this discussion. You can start a new one.

Keyboard shortcuts


? Show this help
ESC Blurs the current field

Comment Form

r Focus the comment reply box
^ + ↩ Submit the comment

You can use Command ⌘ instead of Control ^ on Mac