Thunderbird 17.0 ESR was released on 2012-11-23. Current version in RHEL is 10.
Please consider updating.
This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.
Done by thunderbird-17.0.3-2.el6_4