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

noreply at thewildbeast.co.uk noreply at thewildbeast.co.uk
Fri Jul 12 22:54:50 CEST 2013


            Bug ID: 2968
           Summary: Redundant headers in PGP/MIME signed messages
    Classification: Unclassified
           Product: Claws Mail
           Version: 3.9.1
          Hardware: PC
                OS: Windows XP
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Plugins/Privacy
          Assignee: users at lists.claws-mail.org
          Reporter: LoseDanger at mailinator.com

When Claws Mail sends PGP/MIME signed messages, it uses these headers for the
signature part of the message:

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

To bring it in line with how Claws Mail sends other attachments, the name= is
redundant. Additionally, considering
http://www.imc.org/ietf-smtp/mail-archive/msg05023.html it is better behavior
now to get rid of the name= header.

This is further confirmed in rfc3156, https://tools.ietf.org/html/rfc3156 ,
section 9.2.  Registration of the application/pgp-signature media type.

However, the most standardized behavior is to have just "Content-Type:
application/pgp-signature", with no name parameter, and no Content-Disposition,
as shown in the same rfc3156.

There area already various clients that behave in this way, such as Mutt and
Gnus, and it does not cause any problems.

You can for example see the conclusion nicely reached on the mutt bugtracker,
where it is probably explained the best: http://dev.mutt.org/trac/ticket/3067

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