FAILURE encrypt 53

Matthias's Avatar


10 Oct, 2018 01:17 PM

I'm using GPG with Mailmate on MacOS 10.12 and I get with one recipient the following error:
While trying to send an encrypted message and get the following error:
INV_RECP 0 [email blocked]
FAILURE encrypt 53

The key is valid, but I can't encrypt, what to do?

Please note, with AppleMail I just get the error, Mail can't be encrypted.


  1. Support Staff 1 Posted by Steve on 18 Oct, 2018 10:24 AM

    Steve's Avatar

    Hi Matthias,

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

    Please excuse the late reply, we are deeply sorry for not responding earlier. The amount of feedback we received in regards to the GPG Suite 2018.4 release was overwhelming - both positive and negative. We are doing our best to catch up as fast as we can.

    We do not develop Mailmate nor the plugin for that mail client.

    Regarding and GPG Mail, could you send a screenshot of the error message you are seeing there?


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