there are 5 TYPO3 sites to make updates.
4 of them are version TYPO3 4.5
one is TYPO3 4.7
and 3 others that are closed now because of hacker danger (same template as www.cib.or.at).
The sites use the plugin powermail.
It does not have to be up to the last version. The thing is, that they are secure so they do not get hacked.