Luke Le on 07 Jul, 2018 03:16 PM
we are very sorry you are having problems with GPG Suite.
When you try to decrypt the message, do you see a warning about integrity protection (from 2018.3 onward)? Even if you see an error dialog, is the file really not decrypted in the end? It might be that only the error is shown, but the file is still decrypted, since the error is related to the signature of the file.
And last, please let us know what kind of software the other party is using, since they seem to be sending files without integrity protection (MDC) which is pretty bad from a security perspective (to learn why see efail)