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Created attachment 633813 [details]
openchange-1.0-writestream.patch

This is a "clone" of the upstream bug report:
https://bugzilla.gnome.org/show_bug.cgi?id=682449

Since OpenChange 1.0 users are unable to send messages with large message body and/or attachments, the WriteStream function fails. There was a problem due to changes in samba4, which discovered little issues in OpenChange's exchange.idl definitions. More info tin the upstream bug and in the OpenChange's devel mailing list:
   http://mailman.openchange.org/pipermail/devel/2012-August/005483.html

This bug is affection also users of evolution-mapi.

Fedora packages (17, 18 and master) contain the attached patch already.

This request was evaluated by Red Hat Product Management for
inclusion in a Red Hat Enterprise Linux release.  Product
Management has requested further review of this request by
Red Hat Engineering, for potential inclusion in a Red Hat
Enterprise Linux release for currently deployed products.
This request is not yet committed for inclusion in a release.

I just built openchange-1.0-3.el6 with the patch included.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2013-0515.html