[Pkg-mailman-hackers] Bug#611804: Bug#611804: Astonishing header mangling

[Thijs Kinkhorst]

tags 611804 moreinfo
severity 611804 important
thanks

Hi Ian,

On Wed, February 2, 2011 15:04, Ian Jackson wrote:
> Package: mailman
> Version: 1:2.1.11-11+lenny1
> Severity: serious
>
> Mailman does stuff to the headers of messages which pass through it.
> This can completely break the syntax and semantics of eg the CC
> header.
>
> Mailman should not edit existing headers _at all_.
>
> For example, I sent this message (using Emacs VM):
>
>   Date: Wed, 2 Feb 2011 13:00:59 +0000
>   MIME-Version: 1.0
>   Content-Type: text/plain; charset=us-ascii
>   Content-Transfer-Encoding: 7bit
>   To: test-list at chiark.greenend.org.uk
>   Cc: Ian Jackson <Ian.Jackson at eu.citrix.com>, Ian Jackson
> 	  <ijackson+long.address at slimy.greenend.org.uk>, Some Person With
> 	  A Whole Paragraph Of Words Preceding Their Email Address Which
> 	  Will Make It Word Wrap <0ijacksonk.test at slimy.greenend.org.uk>,
> 	  Some Other Address <0ijacksonk.test2 at slimy.greenend.org.uk>

Thanks for reporting this, but I cannot reproduce it. I'm also using
mailman/1:2.1.11-11+lenny1 to test, with Postfix, and these headers (I
changed only the email addresses) pass through literally, without change.

Since you have a system where you're experiencing the issue, perhaps you
can try to find out more to pinpoint which combination is needed to
trigger this problem, or if newer Mailman versions make any difference.

In any case, reproducible or not, I do not think that release critical
severity is justified here. For the moment assuming this is Mailmans
fault, yes, it's a bug, the situation that triggers it is sufficiently
exotic to not make Mailman completely unusable.

cheers,
Thijs