On 7/24/2019 6:38 PM, Lentes, Bernd wrote:
>
>
> ----- On Jul 24, 2019, at 5:58 PM, john doe [email protected] 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 [email protected] 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)
>> <[email protected]>"
>> 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 [email protected], 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 <[email protected]>"'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)?

1)
https://docplayer.org/2073295-Neue-e-mail-einstellungen-fuer-pop3-und-imap-benutzer.html

--
John Doe

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