namailsj at yahoo
Oct 17, 2009, 8:46 PM
Post #5 of 5
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Re: dbmail forwarding breaks emails signed by domainkeys
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I'm using gmime-2.2.24.
I was able to confirm through testing that gmime is changing the header Mime-Version to MIME-Version, its in "gmime/gmime-message.c"
Modifying the above file to keep the header as Mime-Version, resolved my other problem with domainkeys for that particular email.
I will be looking further into gmime testing over the next week.
Thank you.
----- Original Message ----
From: Aaron Stone <aaron[at]serendipity.cx>
To: DBMail mailinglist <dbmail[at]dbmail.org>
Sent: Sat, October 17, 2009 2:10:30 PM
Subject: Re: [Dbmail] dbmail forwarding breaks emails signed by domainkeys
No apologies, that's a good find. How did you test the library? What
version of gmime are you working with?
Aaron
On Oct 17, 2009, at 2:03 PM, N Sj <namailsj[at]yahoo.com> wrote:
> I was able to further narrow down the problem to gmime (not dbmail),
> which changes "Mime-Version" to uppercase "MIME-Version" and its
> causing problems with domainkeys signed emails.
>
> I apologize for taking up everybody's precious time.
>
>
>
>
> ----- Original Message ----
> From: N Sj <namailsj[at]yahoo.com>
> To: dbmail[at]dbmail.org
> Sent: Thu, October 15, 2009 2:50:18 PM
> Subject: Re: [Dbmail] dbmail forwarding breaks emails signed by
> domainkeys
>
> diff of emails forwarded by dbmail and postfix shows that dbmail
> changes the "Mime-Version" to "MIME-Version" (upper-case MIME) and
> splits Content-Type in two lines, second line starting with a TAB
> before the boundary. Could this be enough to invalidate the
> domainkey signatures
>
> copy/pasting the diff below but email might not show the tabs or
> newline, so attaching it as a text file also.
>
> [mymail[at]mymail 7]# diff -c postfix_forward dbmail_forward
> *** postfix_forward 2009-10-15 14:25:45.000000000 -0700
> --- dbmail_forward 2009-10-15 14:25:41.000000000 -0700
> ***************
> *** 9,18 ****
> Reply-To: member[at]ebay.com
> To: XXX[at]XXX.com
> Subject: XXX thought you might like this item on eBay
> - Mime-Version: 1.0
> - Content-Type: multipart/alternative;
> boundary=1922003599.1255638452226.JavaMail.SYSTEM.la-wconta003
> X-eBay-MailTracker: 11030.637.0.50297
> X-eBay-MailVersionTracker: 637.10150400
>
> --1922003599.1255638452226.JavaMail.SYSTEM.la-wconta003
> Content-Type: text/plain;charset=ISO-8859-1
> --- 9,19 ----
> Reply-To: member[at]ebay.com
> To: XXX[at]XXX.com
> Subject: XXX thought you might like this item on eBay
> X-eBay-MailTracker: 11030.637.0.50297
> X-eBay-MailVersionTracker: 637.10150400
> + MIME-Version: 1.0
> + Content-Type: multipart/alternative;
> + boundary=1922003599.1255638452226.JavaMail.SYSTEM.la-wconta003
>
> --1922003599.1255638452226.JavaMail.SYSTEM.la-wconta003
> Content-Type: text/plain;charset=ISO-8859-1
>
>
>
>
> ----- Original Message ----
> From: N Sj <namailsj[at]yahoo.com>
> To: dbmail[at]dbmail.org
> Sent: Mon, October 12, 2009 8:38:31 AM
> Subject: [Dbmail] dbmail forwarding breaks emails signed by domainkeys
>
> I'm having problems when forwarding domaikeys (not DKIM) signed
> emails from dbmail to a mailserver (such as gmail) that checks for
> DomainKeys.
>
> ebay uses DomainKeys not DKIM for signing their emails, and Yahoo
> uses both domainkeys and DKIM, so the problem at this moment is only
> with ebay.
>
> From ebay site when I click on "share" an auction with a friend, it
> sends an email to an email-id on dbmail server which is configured
> to forward to an address at gmail.com but it fails.
> As I understand that dbmail forward opens a pipe to sendmail
> (sendmail command from postfix in this case) which re-writes the
> From address hence invalidating the email signed using domainkeys.
> Whereas if email is forwarded without interacting with dbmail such
> as using virtual_maps or .forward file, then postfix doesn't rewrite
> any of the headers and all the forwards work fine.
>
> I'm having a tough time figuring out a workaround to this problem so
> any help from anybody would be very much appreciated.
> Is there any other alternative pipe program that can be used to
> forward emails.
>
>
> Thanks
>
>
>
>
> _______________________________________________
> DBmail mailing list
> DBmail[at]dbmail.org
> http://mailman.fastxs.nl/cgi-bin/mailman/listinfo/dbmail
>
>
>
>
> _______________________________________________
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> DBmail[at]dbmail.org
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forward_diff.txt
