[Users] [Bug 2968] Redundant headers in PGP/MIME signed messages

[noreply at thewildbeast.co.uk]

http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=2968

--- Comment #2 from LoseDanger at mailinator.com ---
If not a bug, then certainly unfortunate behavior for the following reason:

When claws receives a PGP/MIME signed message that contains

Content-Type: application/pgp-signature; name=signature.asc
Content-Disposition: attachment; filename=signature.asc

it presents the signature as attachment to be saved/displayed. However, this
"attachment" is meaningless for viewing or saving - it is just another message
part. It really is bad practice to think of the signature part of a message as
an attachment.

When claws receives a PGP/MIME signed message that contains just

Content-Type: application/pgp-signature

it does not present any attachment options for it (no viewing/saving), which is
better (and less confusing for newbies) behavior for handling signatures.
Additionally, the signature part of the message can still be viewed correctly
(e.g. for personal enjoyment) by clicking it in the MIME Type view of the
message.

Also, Mutt & Thunderbird (both with Enigmail & without) correctly show no
options for the pgp signature if it has no name and no content-disposition.

Outlook (without pgp plugins) remains indifferent and will still show it as an
attachment, but nothing breaks.

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