TYPO3 Core

Right now the only way to manipultate the label of the edit document controller is by using $GLOBALS['TCA']['tt_content']['ctrl']['label_userFunc']. This is quite fishy and very inflexible, since it is evaluated for all tt_content elements. This could be handled by an early return

if ($params['row']['CType'] !== 'mailform') {
    return;
}

Strangly, the condition is not evaluated correctly. The accessible parameters contain quite a bunch of arrays. Not only the current tt_content element is available, even all of the other elements on the page. This should be optimized at first for a better performance.

Since the new ext:form version works in a different way and don't add content into the bodytext field this issue can be closed, right?

Yes, we do not need it anymore. Closed.