[BUGFIX] #48612
powermail 2.x integration

Resolves: #48612
Releases: 6.1, 4.7, 4.5
Change-Id: I67f610f27bc21e473aac5aab6a0298e130cb165b
Reviewed-on: https://review.typo3.org/29048
Reviewed-by: Ralf Zimmermann
Tested-by: Ralf Zimmermann