The next version to be supported is the version that will be the first ESR. It was normally scheduled to be based on Thunderbird 8 but recent discussions tend to push that towards Thunderbird 10.
I think this can help https://wiki.mozilla.org/Enterprise/Thunderbird/ExtendedSupport http://groups.google.com/group/tb-enterprise/browse_thread/thread/4ab90fd4961ee2c -- [email protected] https://inverse.ca/sogo/lists
