https://bugs.kde.org/show_bug.cgi?id=358785
Bug ID: 358785
Summary: When forwarding a email as message/rfc822 attachment
in a signed unencrypted email, header filtering leads
to invalid signatures
Product: kmail2
Version: 4.14.7
Platform: Gentoo Packages
OS: Linux
Status: UNCONFIRMED
Severity: wishlist
Priority: NOR
Component: composer
Assignee: [email protected]
Reporter: [email protected]
I forwarded an email as a message/rfc822 attachment. The forwarded e-mail
contained headers such as "X-Spam-Score" and some intermediate server filtered
these out, despite them being part of the message rather than in the headers of
the email I was sending. Because the headers of the forwarded message are
included in the multipart/signed PGP signature, the signature is now invalid.
This isn't a bug in KMail as such, but KMail could be set up to work around it
(which is why I have marked this bug report as a feature request).
Possible workarounds which could be done by KMail:
* Strip all but standard headers (e.g. Sender, From etc) when forwarding emails
as message/rfc822
* Encode message/rfc822 attachments using base64 (or possibly abuse
quoted-printable by quoting the header lines even when they do not need to be
quoted)
Reproducible: Always
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