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I started sending mail encrypted with openPGP (Thunderbird + Enigmail) this month and it has worked perfectly for several weeks. Today I attempted to send an encrypted message, but received this rejection from "Mail Delivery System" instead:
19 cze 2014 · Self-decrypting messages (thus being wrapped in an executable) are not specified in OpenPGP, and not supported by GnuPG. Tell the sender who encrypted the file he should send you standard OpenPGP messages instead.
17 gru 2021 · W kolejnym artykule z cyklu traktującym o bezpiecznym przesyłaniu dokumentów dziś zajmiemy się narzędziem, o którym już pisałem w kontekście podpisywania i szyfrowania wiadomości e-mail zarówno dla programu pocztowego Thunderbird jak i dla programu Outlook.
25 wrz 2023 · Aby korzystać z OpenPGP w Thunderbirdzie, trzeba ustawić tak zwaną parę kluczy osobistych dla swojego adresu e-mail. Możesz to zrobić w ustawieniach konta w sekcji Szyfrowanie „end-to-end” .
27 wrz 2024 · If your system doesn‘t have the necessary CA certificates installed, it may fail to download GPG keys securely, resulting in the "no valid OpenPGP data found" error. To resolve this, you can install or update the ca-certificates package using your distribution‘s package manager.
OpenPGP is the most widely used email encryption standard. It is defined by the OpenPGP Working Group of the Internet Engineering Task Force (IETF) as a Proposed Standard in RFC 9580. OpenPGP was originally derived from the PGP software, created by Phil Zimmermann.
24 lip 2018 · Many packages—such as GPG Suite by GPGTools—will automatically install a plugin for popular email clients, including Apple Mail, Microsoft Outlook or Mozilla Thunderbird. When emailing someone whose PGP key you possess, your OpenPGP software should give the option to encrypt and/or sign the email.
