On 05/26/2018 11:18 AM, Aleksandar Lazic wrote:

Note also that mail encryption is currently NOT secure
(CVE-2017-17688): https://efail.de/

Please be more precise!
https://efail.de/#mitigations

The encryption is still secure.
The attack works because of *not good* gpg/smime implementation in the mail clients.

Yes: my statement was in "short form", with a link for details.
The problem is actually not encryption, but MUAs not respecting the mime structure of received composite mails at some level. Thunderbird/Enigmail, which is mentioned by Alain, fixes it in 52.8 (https://www.mozilla.org/en-US/security/advisories/mfsa2018-13/) which is very young (May 18, 2018) thus not likely to be installed on most workstations.

The bottom line for me is, don't use HTML emails!
Plaintext mails are still secure, IMHO.

No they aren't: the HTML leading and trailing parts are supposed to be forged by a MITM before reaching the recipient's MUA, therefore out of sender's or recipient's control.

In any case, this is out of curl scope: I wrote this note just to bring Alain's attention on it.
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