Where to get help
You can get help in the TYPO3 Slack https://typo3.org/community/meet/chat-slack, Ask a question in the official TYPO3 forum, https://talk.typo3.org/c/typo3-questions/19 or contact the extension author.
Report Issues
You can report issues at https://github.com/Digi92/mosparo-powermail/issues.