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Date: Fri, 7 Jul 2006 11:30:19 +1000
From: Andrew Reilly <andrew-freebsd@areilly.bpc-users.org>
To: Albert <alpha2@sansha.tatung.com.tw>
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Cc: freebsd-amd64@FreeBSD.org
Subject: Re: amd64/99475: Mail attachement was modified
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On Fri, Jul 07, 2006 at 12:30:28AM +0000, Albert wrote:
> The following reply was made to PR amd64/99475; it has been noted by GNATS.
> 
> From: Albert <alpha2@sansha.tatung.com.tw>
> To: bug-followup@FreeBSD.org
> Cc:  
> Subject: Re: amd64/99475: Mail attachement was modified
> Date: Fri, 07 Jul 2006 08:22:32 +0800
> 
>  I just use FreeBSD 6.1/amd64 SMP to set up a mail server.
>  I use the default sendmail.cf, open relay on my own network, and send
>  mail via Thunderbird to myself.
>  Three type of encoding are used -- big5, iso-2002-jp, iso-8859-1
>  The mail content is all okey. (I mean the mail content is unchanged)
>  Then I test a mail with attachments -- pdf, ppt, xls, doc, txt, jpg.
>  When I receive the mail by pop3, all the attachments became random code
>  except text files whatever the encoding is.
>  I upgrade sendmail form 8.13.6 to 8.13.7. The results are the same.
>  
>  Now I back to FreeBSD 5.5/i386 SMP + sendmail 8.13.6, All works perfect
>  as I want.

There was a recent security advisory involving sendmail and MIME
attachments that could be related to this.

I don't understand what business sendmail has even *looking*
at the MIME structure of a message, let alone mucking about
with it.  I'd say use that as yet another reason to change to
a different MTA.  (I noticed that NetBSD seems to have removed
sendmail from the base system altogether in recent current, in
favour of postfix...)

Cheers,

-- 
Andrew