new to GPG: "gpg: Fatal: zlib inflate problem: invalid code lengths set"

john doe johndoe65534 at
Wed Jul 24 19:08:59 CEST 2019

On 7/24/2019 6:38 PM, Lentes, Bernd wrote:
> ----- On Jul 24, 2019, at 5:58 PM, john doe johndoe65534 at wrote:
>> Quoting your original e-mail:
>> "i'm new to GPG, so please excuse asking silly questions.
>> I managed to create my keys with "gpg2 --gen-key"
>> I wrote an e-Mail to adele at with the subject "Mein öffentlicher
>> Schlüssel", which is german for "my public key".
>> Shortly thereafter i got an encrypted response which, i assume, i have to
>> decrypt with my private key.
>> I pasted the encrypted stuff into a file and then tried to decrypt:
>> gpg2 -d nachricht.txt
>> I've been asked for the passphrase for my private key which i entered,
>> but then
>> i got the following error:
>> gpg: encrypted with 2048-bit RSA key, ID F742DB29, created 2019-07-23
>>      "Bernd Lentes (Helmholtz GPG Schluessel)
>> <bernd.lentes at>"
>> gpg: Fatal: zlib inflate problem: invalid code lengths set
>> The file has a size of 68 KB, could that be the culprit ?"
>> Now addressing what I think is the culprit:
>> You encrypt your e-mail with the public key of the recipient.
>> When you are the recipient of an encrypted e-mail, the sender needs your
>> publick key to be able to encrypt  the e-mail that will be send to you.
>> You, the recipient, will use your private key to decrypt this e-mail.
> That's exactly what i did.
> I sent my Public key to adele at, which is a german project for GPG,
> and the server and adele are for practicing.
> Adele took my public key and sent me an e-Mail with some text and her public key,
> so i should be able to decrypt that with my private key.
> I don't have a plugin for my e-Mail-program because i just use the webinterface of the e-Mail-Server.

In addition to "Andrew Gallagher <andrewg at>"'s answer:

Can't you use IMAP/POP3 to access your e-mail and SMTP to send your
e-mail (1, my German is not that great)?


John Doe

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